Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2014

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:

	2014		2013		2012
PPL	$	31.50	$	30.30	$	28.35
PPL Energy Supply		31.70		30.42		28.29
PPL Electric		31.81		30.55		28.51
LKE		30.98		30.00		28.34

Restricted Stock and Restricted Stock Units, Activity Rollforward

Restricted stock and restricted stock unit activity for 2014 was:

			Weighted-
			Average
		Restricted	Grant Date Fair
		Shares/Units	Value Per Share
PPL
Nonvested, beginning of period		3,140,600	$	28.50
	Granted	1,197,947		31.50
	Vested	(804,582)		26.01
	Forfeited	(48,445)		30.48
Nonvested, end of period		3,485,520		30.07
PPL Energy Supply
Nonvested, beginning of period		1,343,404	$	28.71
	Transferred	70,298		27.43
	Granted	465,238		31.70
	Vested	(395,740)		26.19
	Forfeited	(25,300)		30.54
Nonvested, end of period		1,457,900		30.13
PPL Electric
Nonvested, beginning of period		265,550	$	28.22
	Transferred	2,270		29.03
	Granted	103,511		31.81
	Vested	(78,370)		26.04
	Forfeited	(6,150)		30.65
Nonvested, end of period		286,811		30.04
LKE
Nonvested, beginning of period		231,553	$	29.17
	Granted	112,625		30.98
	Vested	(2,710)		29.97
Nonvested, end of period		341,468		29.76

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:

	2014		2013		2012
PPL	$	21	$	19	$	27
PPL Energy Supply		10		7		6
PPL Electric		2		3		2
LKE				1		4

Performance Units, Valuation Assumptions

The weighted-average assumptions used in the model were:

	2014	2013	2012
Risk-free interest rate	0.75%	0.36%	0.30%
Expected stock volatility	15.80%	15.50%	19.30%
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:

	2014		2013		2012
PPL	$	34.55	$	34.15	$	31.41
PPL Energy Supply		34.35		34.29		31.40
PPL Electric		34.43		33.97		31.37
LKE		34.12		33.84		31.30

Performance Units, Activity Rollforward

Performance unit activity for 2014 was:

				Weighted-
				Average Grant
		Performance		Date Fair Value
		Units		Per Share
PPL
Nonvested, beginning of period			793,199	$	32.19
	Granted		555,553		34.55
	Vested		(177,036)		29.11
Nonvested, end of period			1,171,716		33.77
PPL Energy Supply
Nonvested, beginning of period			170,609	$	32.22
	Transferred		27,656		32.12
	Granted		138,601		34.35
	Vested		(45,374)		29.11
Nonvested, end of period			291,492		33.71
PPL Electric
Nonvested, beginning of period			38,210	$	32.22
	Granted		29,701		34.43
	Vested		(8,296)		28.99
Nonvested, end of period			59,615		33.77
LKE
Nonvested, beginning of period			129,630	$	31.88
	Granted		75,174		34.12
	Vested		(30,858)		29.20
Nonvested, end of period			173,946		33.32

Stock Options, Valuation Assumptions

The assumptions used in the model were:

	2013		2012
Risk-free interest rate		1.15%		1.13%
Expected option life		6.48 years		6.17 years
Expected stock volatility		18.50%		20.60%
Dividend yield		5.00%		5.00%

Stock Options, Weighted Average Grant Date Fair Value

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

	2013		2012
PPL	$	2.18	$	2.48
PPL Energy Supply		2.19		2.51
PPL Electric		2.19		2.50
LKE		2.18		2.51

Stock Options, Activity Rollforward

Stock option activity for 2014 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			11,381,482	$	30.45
	Exercised		(2,338,520)		28.58
Outstanding at end of period			9,042,962		30.93		5.9	$	56
Options exercisable at end of period			6,432,806		31.60		5.2		38
PPL Energy Supply
Outstanding at beginning of period			2,845,336	$	30.47
	Transferred		458,800		30.47
	Exercised		(559,120)		28.79
Outstanding at end of period			2,745,016		30.84		5.6	$	17
Options exercisable at end of period			2,166,150		31.24		5.0		13
PPL Electric
Outstanding at beginning of period			532,200	$	30.04
	Exercised		(24,280)		30.12
Outstanding at end of period			507,920		30.04		6.3	$	3
Options exercisable at end of period			386,413		30.27		5.8		3
LKE
Outstanding at beginning of period			997,156	$	28.35
	Exercised		(373,839)		27.87
Outstanding at end of period			623,317		28.64		7.5	$	5
Options exercisable at end of period			215,106		27.58		6.9		2

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 Energy Supply, PPL Electric and LKE includes an allocation of PPL Services' expense, was:

	2014		2013		2012
PPL	$	63	$	52	$	49
PPL Energy Supply		33		27		23
PPL Electric		12		10		11
LKE		8		8		8

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

	2014		2013		2012
PPL	$	26	$	22	$	20
PPL Energy Supply		14		11		10
PPL Electric		5		4		4
LKE		3		3		4

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

At December 31, 2014, 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	$	27		1.7 years
PPL Energy Supply		13		1.8 years
PPL Electric		3		1.8 years
LKE		2		1.3 years

PPL Energy Supply 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:

	2014		2013		2012
PPL	$	31.50	$	30.30	$	28.35
PPL Energy Supply		31.70		30.42		28.29
PPL Electric		31.81		30.55		28.51
LKE		30.98		30.00		28.34

Restricted Stock and Restricted Stock Units, Activity Rollforward

Restricted stock and restricted stock unit activity for 2014 was:

			Weighted-
			Average
		Restricted	Grant Date Fair
		Shares/Units	Value Per Share
PPL
Nonvested, beginning of period		3,140,600	$	28.50
	Granted	1,197,947		31.50
	Vested	(804,582)		26.01
	Forfeited	(48,445)		30.48
Nonvested, end of period		3,485,520		30.07
PPL Energy Supply
Nonvested, beginning of period		1,343,404	$	28.71
	Transferred	70,298		27.43
	Granted	465,238		31.70
	Vested	(395,740)		26.19
	Forfeited	(25,300)		30.54
Nonvested, end of period		1,457,900		30.13
PPL Electric
Nonvested, beginning of period		265,550	$	28.22
	Transferred	2,270		29.03
	Granted	103,511		31.81
	Vested	(78,370)		26.04
	Forfeited	(6,150)		30.65
Nonvested, end of period		286,811		30.04
LKE
Nonvested, beginning of period		231,553	$	29.17
	Granted	112,625		30.98
	Vested	(2,710)		29.97
Nonvested, end of period		341,468		29.76

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:

	2014		2013		2012
PPL	$	21	$	19	$	27
PPL Energy Supply		10		7		6
PPL Electric		2		3		2
LKE				1		4

Performance Units, Valuation Assumptions

The weighted-average assumptions used in the model were:

	2014	2013	2012
Risk-free interest rate	0.75%	0.36%	0.30%
Expected stock volatility	15.80%	15.50%	19.30%
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:

	2014		2013		2012
PPL	$	34.55	$	34.15	$	31.41
PPL Energy Supply		34.35		34.29		31.40
PPL Electric		34.43		33.97		31.37
LKE		34.12		33.84		31.30

Performance Units, Activity Rollforward

Performance unit activity for 2014 was:

				Weighted-
				Average Grant
		Performance		Date Fair Value
		Units		Per Share
PPL
Nonvested, beginning of period			793,199	$	32.19
	Granted		555,553		34.55
	Vested		(177,036)		29.11
Nonvested, end of period			1,171,716		33.77
PPL Energy Supply
Nonvested, beginning of period			170,609	$	32.22
	Transferred		27,656		32.12
	Granted		138,601		34.35
	Vested		(45,374)		29.11
Nonvested, end of period			291,492		33.71
PPL Electric
Nonvested, beginning of period			38,210	$	32.22
	Granted		29,701		34.43
	Vested		(8,296)		28.99
Nonvested, end of period			59,615		33.77
LKE
Nonvested, beginning of period			129,630	$	31.88
	Granted		75,174		34.12
	Vested		(30,858)		29.20
Nonvested, end of period			173,946		33.32

Stock Options, Valuation Assumptions

The assumptions used in the model were:

	2013		2012
Risk-free interest rate		1.15%		1.13%
Expected option life		6.48 years		6.17 years
Expected stock volatility		18.50%		20.60%
Dividend yield		5.00%		5.00%

Stock Options, Weighted Average Grant Date Fair Value

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

	2013		2012
PPL	$	2.18	$	2.48
PPL Energy Supply		2.19		2.51
PPL Electric		2.19		2.50
LKE		2.18		2.51

Stock Options, Activity Rollforward

Stock option activity for 2014 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			11,381,482	$	30.45
	Exercised		(2,338,520)		28.58
Outstanding at end of period			9,042,962		30.93		5.9	$	56
Options exercisable at end of period			6,432,806		31.60		5.2		38
PPL Energy Supply
Outstanding at beginning of period			2,845,336	$	30.47
	Transferred		458,800		30.47
	Exercised		(559,120)		28.79
Outstanding at end of period			2,745,016		30.84		5.6	$	17
Options exercisable at end of period			2,166,150		31.24		5.0		13
PPL Electric
Outstanding at beginning of period			532,200	$	30.04
	Exercised		(24,280)		30.12
Outstanding at end of period			507,920		30.04		6.3	$	3
Options exercisable at end of period			386,413		30.27		5.8		3
LKE
Outstanding at beginning of period			997,156	$	28.35
	Exercised		(373,839)		27.87
Outstanding at end of period			623,317		28.64		7.5	$	5
Options exercisable at end of period			215,106		27.58		6.9		2

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 Energy Supply, PPL Electric and LKE includes an allocation of PPL Services' expense, was:

	2014		2013		2012
PPL	$	63	$	52	$	49
PPL Energy Supply		33		27		23
PPL Electric		12		10		11
LKE		8		8		8

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

	2014		2013		2012
PPL	$	26	$	22	$	20
PPL Energy Supply		14		11		10
PPL Electric		5		4		4
LKE		3		3		4

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

At December 31, 2014, 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	$	27		1.7 years
PPL Energy Supply		13		1.8 years
PPL Electric		3		1.8 years
LKE		2		1.3 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:

	2014		2013		2012
PPL	$	31.50	$	30.30	$	28.35
PPL Energy Supply		31.70		30.42		28.29
PPL Electric		31.81		30.55		28.51
LKE		30.98		30.00		28.34

Restricted Stock and Restricted Stock Units, Activity Rollforward

Restricted stock and restricted stock unit activity for 2014 was:

			Weighted-
			Average
		Restricted	Grant Date Fair
		Shares/Units	Value Per Share
PPL
Nonvested, beginning of period		3,140,600	$	28.50
	Granted	1,197,947		31.50
	Vested	(804,582)		26.01
	Forfeited	(48,445)		30.48
Nonvested, end of period		3,485,520		30.07
PPL Energy Supply
Nonvested, beginning of period		1,343,404	$	28.71
	Transferred	70,298		27.43
	Granted	465,238		31.70
	Vested	(395,740)		26.19
	Forfeited	(25,300)		30.54
Nonvested, end of period		1,457,900		30.13
PPL Electric
Nonvested, beginning of period		265,550	$	28.22
	Transferred	2,270		29.03
	Granted	103,511		31.81
	Vested	(78,370)		26.04
	Forfeited	(6,150)		30.65
Nonvested, end of period		286,811		30.04
LKE
Nonvested, beginning of period		231,553	$	29.17
	Granted	112,625		30.98
	Vested	(2,710)		29.97
Nonvested, end of period		341,468		29.76

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:

	2014		2013		2012
PPL	$	21	$	19	$	27
PPL Energy Supply		10		7		6
PPL Electric		2		3		2
LKE				1		4

Performance Units, Valuation Assumptions

The weighted-average assumptions used in the model were:

	2014	2013	2012
Risk-free interest rate	0.75%	0.36%	0.30%
Expected stock volatility	15.80%	15.50%	19.30%
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:

	2014		2013		2012
PPL	$	34.55	$	34.15	$	31.41
PPL Energy Supply		34.35		34.29		31.40
PPL Electric		34.43		33.97		31.37
LKE		34.12		33.84		31.30

Performance Units, Activity Rollforward

Performance unit activity for 2014 was:

				Weighted-
				Average Grant
		Performance		Date Fair Value
		Units		Per Share
PPL
Nonvested, beginning of period			793,199	$	32.19
	Granted		555,553		34.55
	Vested		(177,036)		29.11
Nonvested, end of period			1,171,716		33.77
PPL Energy Supply
Nonvested, beginning of period			170,609	$	32.22
	Transferred		27,656		32.12
	Granted		138,601		34.35
	Vested		(45,374)		29.11
Nonvested, end of period			291,492		33.71
PPL Electric
Nonvested, beginning of period			38,210	$	32.22
	Granted		29,701		34.43
	Vested		(8,296)		28.99
Nonvested, end of period			59,615		33.77
LKE
Nonvested, beginning of period			129,630	$	31.88
	Granted		75,174		34.12
	Vested		(30,858)		29.20
Nonvested, end of period			173,946		33.32

Stock Options, Valuation Assumptions

The assumptions used in the model were:

	2013		2012
Risk-free interest rate		1.15%		1.13%
Expected option life		6.48 years		6.17 years
Expected stock volatility		18.50%		20.60%
Dividend yield		5.00%		5.00%

Stock Options, Weighted Average Grant Date Fair Value

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

	2013		2012
PPL	$	2.18	$	2.48
PPL Energy Supply		2.19		2.51
PPL Electric		2.19		2.50
LKE		2.18		2.51

Stock Options, Activity Rollforward

Stock option activity for 2014 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			11,381,482	$	30.45
	Exercised		(2,338,520)		28.58
Outstanding at end of period			9,042,962		30.93		5.9	$	56
Options exercisable at end of period			6,432,806		31.60		5.2		38
PPL Energy Supply
Outstanding at beginning of period			2,845,336	$	30.47
	Transferred		458,800		30.47
	Exercised		(559,120)		28.79
Outstanding at end of period			2,745,016		30.84		5.6	$	17
Options exercisable at end of period			2,166,150		31.24		5.0		13
PPL Electric
Outstanding at beginning of period			532,200	$	30.04
	Exercised		(24,280)		30.12
Outstanding at end of period			507,920		30.04		6.3	$	3
Options exercisable at end of period			386,413		30.27		5.8		3
LKE
Outstanding at beginning of period			997,156	$	28.35
	Exercised		(373,839)		27.87
Outstanding at end of period			623,317		28.64		7.5	$	5
Options exercisable at end of period			215,106		27.58		6.9		2

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 Energy Supply, PPL Electric and LKE includes an allocation of PPL Services' expense, was:

	2014		2013		2012
PPL	$	63	$	52	$	49
PPL Energy Supply		33		27		23
PPL Electric		12		10		11
LKE		8		8		8

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

	2014		2013		2012
PPL	$	26	$	22	$	20
PPL Energy Supply		14		11		10
PPL Electric		5		4		4
LKE		3		3		4

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

At December 31, 2014, 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	$	27		1.7 years
PPL Energy Supply		13		1.8 years
PPL Electric		3		1.8 years
LKE		2		1.3 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:

	2014		2013		2012
PPL	$	31.50	$	30.30	$	28.35
PPL Energy Supply		31.70		30.42		28.29
PPL Electric		31.81		30.55		28.51
LKE		30.98		30.00		28.34

Restricted Stock and Restricted Stock Units, Activity Rollforward

Restricted stock and restricted stock unit activity for 2014 was:

			Weighted-
			Average
		Restricted	Grant Date Fair
		Shares/Units	Value Per Share
PPL
Nonvested, beginning of period		3,140,600	$	28.50
	Granted	1,197,947		31.50
	Vested	(804,582)		26.01
	Forfeited	(48,445)		30.48
Nonvested, end of period		3,485,520		30.07
PPL Energy Supply
Nonvested, beginning of period		1,343,404	$	28.71
	Transferred	70,298		27.43
	Granted	465,238		31.70
	Vested	(395,740)		26.19
	Forfeited	(25,300)		30.54
Nonvested, end of period		1,457,900		30.13
PPL Electric
Nonvested, beginning of period		265,550	$	28.22
	Transferred	2,270		29.03
	Granted	103,511		31.81
	Vested	(78,370)		26.04
	Forfeited	(6,150)		30.65
Nonvested, end of period		286,811		30.04
LKE
Nonvested, beginning of period		231,553	$	29.17
	Granted	112,625		30.98
	Vested	(2,710)		29.97
Nonvested, end of period		341,468		29.76

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:

	2014		2013		2012
PPL	$	21	$	19	$	27
PPL Energy Supply		10		7		6
PPL Electric		2		3		2
LKE				1		4

Performance Units, Valuation Assumptions

The weighted-average assumptions used in the model were:

	2014	2013	2012
Risk-free interest rate	0.75%	0.36%	0.30%
Expected stock volatility	15.80%	15.50%	19.30%
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:

	2014		2013		2012
PPL	$	34.55	$	34.15	$	31.41
PPL Energy Supply		34.35		34.29		31.40
PPL Electric		34.43		33.97		31.37
LKE		34.12		33.84		31.30

Performance Units, Activity Rollforward

Performance unit activity for 2014 was:

				Weighted-
				Average Grant
		Performance		Date Fair Value
		Units		Per Share
PPL
Nonvested, beginning of period			793,199	$	32.19
	Granted		555,553		34.55
	Vested		(177,036)		29.11
Nonvested, end of period			1,171,716		33.77
PPL Energy Supply
Nonvested, beginning of period			170,609	$	32.22
	Transferred		27,656		32.12
	Granted		138,601		34.35
	Vested		(45,374)		29.11
Nonvested, end of period			291,492		33.71
PPL Electric
Nonvested, beginning of period			38,210	$	32.22
	Granted		29,701		34.43
	Vested		(8,296)		28.99
Nonvested, end of period			59,615		33.77
LKE
Nonvested, beginning of period			129,630	$	31.88
	Granted		75,174		34.12
	Vested		(30,858)		29.20
Nonvested, end of period			173,946		33.32

Stock Options, Valuation Assumptions

The assumptions used in the model were:

	2013		2012
Risk-free interest rate		1.15%		1.13%
Expected option life		6.48 years		6.17 years
Expected stock volatility		18.50%		20.60%
Dividend yield		5.00%		5.00%

Stock Options, Weighted Average Grant Date Fair Value

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

	2013		2012
PPL	$	2.18	$	2.48
PPL Energy Supply		2.19		2.51
PPL Electric		2.19		2.50
LKE		2.18		2.51

Stock Options, Activity Rollforward

Stock option activity for 2014 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			11,381,482	$	30.45
	Exercised		(2,338,520)		28.58
Outstanding at end of period			9,042,962		30.93		5.9	$	56
Options exercisable at end of period			6,432,806		31.60		5.2		38
PPL Energy Supply
Outstanding at beginning of period			2,845,336	$	30.47
	Transferred		458,800		30.47
	Exercised		(559,120)		28.79
Outstanding at end of period			2,745,016		30.84		5.6	$	17
Options exercisable at end of period			2,166,150		31.24		5.0		13
PPL Electric
Outstanding at beginning of period			532,200	$	30.04
	Exercised		(24,280)		30.12
Outstanding at end of period			507,920		30.04		6.3	$	3
Options exercisable at end of period			386,413		30.27		5.8		3
LKE
Outstanding at beginning of period			997,156	$	28.35
	Exercised		(373,839)		27.87
Outstanding at end of period			623,317		28.64		7.5	$	5
Options exercisable at end of period			215,106		27.58		6.9		2

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 Energy Supply, PPL Electric and LKE includes an allocation of PPL Services' expense, was:

	2014		2013		2012
PPL	$	63	$	52	$	49
PPL Energy Supply		33		27		23
PPL Electric		12		10		11
LKE		8		8		8

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

	2014		2013		2012
PPL	$	26	$	22	$	20
PPL Energy Supply		14		11		10
PPL Electric		5		4		4
LKE		3		3		4

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

At December 31, 2014, 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	$	27		1.7 years
PPL Energy Supply		13		1.8 years
PPL Electric		3		1.8 years
LKE		2		1.3 years