Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2016

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.

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

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:

	2016		2015		2014
PPL	$	33.84	$	34.50	$	31.50
PPL Electric	34.32		34.41		31.81
LKE	33.73		34.89		30.98

Restricted Stock and Restricted Stock Units, Activity Rollforward

Restricted stock and restricted stock unit activity for 2016 was:

	Restricted Shares/Units		Weighted- Average Grant Date Fair Value Per Share
PPL
Nonvested, beginning of period	1,679,475		$	29.65
Granted	536,208		33.84
Vested	(869,932	)	29.30
Forfeited	(8,726	)	32.59
Nonvested, end of period (a)	1,337,025		31.57
PPL Electric
Nonvested, beginning of period	221,085		$	29.48
Transfer between registrants	(10,405	)	30.98
Granted	70,486		34.32
Vested	(73,488	)	28.91
Forfeited	(3,108	)	32.81
Nonvested, end of period	204,570		31.27
LKE
Nonvested, beginning of period	318,963		$	29.65
Transfer between registrants	(24,993	)	30.52
Granted	86,987		33.73
Vested	(137,676	)	28.76
Nonvested, end of period	243,281		31.53

(a) Excludes 862,337 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:

	2016		2015		2014
PPL	$	30	$	28	$	11
PPL Electric	3		4		2
LKE	5		4		—

Performance Units, Valuation Assumptions

The weighted-average assumptions used in the model were:

	2016		2015		2014
Expected stock volatility	19.60	%	15.90	%	15.80	%
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:

	2016		2015		2014
PPL	$	35.74	$	36.76	$	34.55
PPL Electric	35.68		37.93		34.43
LKE	35.28		37.10		34.12

Performance Units, Activity Rollforward

Performance unit activity for 2016 was:

	Performance Units		Weighted- Average Grant Date Fair Value Per Share
PPL
Nonvested, beginning of period	993,540		$	33.09
Granted	471,401		35.74
Vested	(375,668	)	31.96
Forfeited	(18,737	)	33.22
Nonvested, end of period (a)	1,070,536		34.65

	Performance Units		Weighted- Average Grant Date Fair Value Per Share
PPL Electric
Nonvested, beginning of period	67,671		$	33.05
Granted	35,694		35.68
Vested	(23,880	)	31.89
Forfeited	(2,759	)	31.74
Nonvested, end of period	76,726		34.68
LKE
Nonvested, beginning of period	193,164		$	32.96
Transfer between registrants	(4,432	)	35.07
Granted	84,298		35.28
Vested	(70,048	)	31.74
Forfeited	(11,381	)	33.61
Nonvested, end of period	191,601		34.34

(a) Excludes 230,196 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, Activity Rollforward

Stock option activity for 2016 was:

	Number of Options		Weighted Average Exercise Price Per Share		Weighted- Average Remaining Contractual Term (years)	Aggregate Total Intrinsic Value
PPL
Outstanding at beginning of period	6,385,149		$	28.54
Exercised	(1,903,989	)	27.51
Outstanding and exercisable at end of period	4,481,160		28.98		4.4	$	29
PPL Electric
Outstanding at beginning of period	313,433		$	27.79
Exercised	(72,494	)	28.84
Outstanding and exercisable at end of period	240,939		27.48		4.5	$	2
LKE
Outstanding at beginning of period	425,656		$	26.08
Exercised	(363,760	)	26.12
Outstanding and exercisable at end of period	61,896		25.81		5.5	$	1

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:

	2016		2015		2014
PPL	$	27	$	33	$	30
PPL Electric	16		14		12
LKE	7		8		8

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

	2016		2015		2014
PPL	$	12	$	14	$	12
PPL Electric	7		6		5
LKE	3		3		3

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

At December 31, 2016, unrecognized compensation expense related to nonvested restricted stock, restricted stock units, and performance units was:

	Unrecognized Compensation Expense		Weighted- Average Period for Recognition
PPL	$	8	1.8
PPL Electric	1		1.8
LKE	1		1.6

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.

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

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:

	2016		2015		2014
PPL	$	33.84	$	34.50	$	31.50
PPL Electric	34.32		34.41		31.81
LKE	33.73		34.89		30.98

Restricted Stock and Restricted Stock Units, Activity Rollforward

Restricted stock and restricted stock unit activity for 2016 was:

	Restricted Shares/Units		Weighted- Average Grant Date Fair Value Per Share
PPL
Nonvested, beginning of period	1,679,475		$	29.65
Granted	536,208		33.84
Vested	(869,932	)	29.30
Forfeited	(8,726	)	32.59
Nonvested, end of period (a)	1,337,025		31.57
PPL Electric
Nonvested, beginning of period	221,085		$	29.48
Transfer between registrants	(10,405	)	30.98
Granted	70,486		34.32
Vested	(73,488	)	28.91
Forfeited	(3,108	)	32.81
Nonvested, end of period	204,570		31.27
LKE
Nonvested, beginning of period	318,963		$	29.65
Transfer between registrants	(24,993	)	30.52
Granted	86,987		33.73
Vested	(137,676	)	28.76
Nonvested, end of period	243,281		31.53

(a) Excludes 862,337 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:

	2016		2015		2014
PPL	$	30	$	28	$	11
PPL Electric	3		4		2
LKE	5		4		—

Performance Units, Valuation Assumptions

The weighted-average assumptions used in the model were:

	2016		2015		2014
Expected stock volatility	19.60	%	15.90	%	15.80	%
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:

	2016		2015		2014
PPL	$	35.74	$	36.76	$	34.55
PPL Electric	35.68		37.93		34.43
LKE	35.28		37.10		34.12

Performance Units, Activity Rollforward

Performance unit activity for 2016 was:

	Performance Units		Weighted- Average Grant Date Fair Value Per Share
PPL
Nonvested, beginning of period	993,540		$	33.09
Granted	471,401		35.74
Vested	(375,668	)	31.96
Forfeited	(18,737	)	33.22
Nonvested, end of period (a)	1,070,536		34.65

	Performance Units		Weighted- Average Grant Date Fair Value Per Share
PPL Electric
Nonvested, beginning of period	67,671		$	33.05
Granted	35,694		35.68
Vested	(23,880	)	31.89
Forfeited	(2,759	)	31.74
Nonvested, end of period	76,726		34.68
LKE
Nonvested, beginning of period	193,164		$	32.96
Transfer between registrants	(4,432	)	35.07
Granted	84,298		35.28
Vested	(70,048	)	31.74
Forfeited	(11,381	)	33.61
Nonvested, end of period	191,601		34.34

(a) Excludes 230,196 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, Activity Rollforward

Stock option activity for 2016 was:

	Number of Options		Weighted Average Exercise Price Per Share		Weighted- Average Remaining Contractual Term (years)	Aggregate Total Intrinsic Value
PPL
Outstanding at beginning of period	6,385,149		$	28.54
Exercised	(1,903,989	)	27.51
Outstanding and exercisable at end of period	4,481,160		28.98		4.4	$	29
PPL Electric
Outstanding at beginning of period	313,433		$	27.79
Exercised	(72,494	)	28.84
Outstanding and exercisable at end of period	240,939		27.48		4.5	$	2
LKE
Outstanding at beginning of period	425,656		$	26.08
Exercised	(363,760	)	26.12
Outstanding and exercisable at end of period	61,896		25.81		5.5	$	1

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:

	2016		2015		2014
PPL	$	27	$	33	$	30
PPL Electric	16		14		12
LKE	7		8		8

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

	2016		2015		2014
PPL	$	12	$	14	$	12
PPL Electric	7		6		5
LKE	3		3		3

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

At December 31, 2016, unrecognized compensation expense related to nonvested restricted stock, restricted stock units, and performance units was:

	Unrecognized Compensation Expense		Weighted- Average Period for Recognition
PPL	$	8	1.8
PPL Electric	1		1.8
LKE	1		1.6

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.

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

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:

	2016		2015		2014
PPL	$	33.84	$	34.50	$	31.50
PPL Electric	34.32		34.41		31.81
LKE	33.73		34.89		30.98

Restricted Stock and Restricted Stock Units, Activity Rollforward

Restricted stock and restricted stock unit activity for 2016 was:

	Restricted Shares/Units		Weighted- Average Grant Date Fair Value Per Share
PPL
Nonvested, beginning of period	1,679,475		$	29.65
Granted	536,208		33.84
Vested	(869,932	)	29.30
Forfeited	(8,726	)	32.59
Nonvested, end of period (a)	1,337,025		31.57
PPL Electric
Nonvested, beginning of period	221,085		$	29.48
Transfer between registrants	(10,405	)	30.98
Granted	70,486		34.32
Vested	(73,488	)	28.91
Forfeited	(3,108	)	32.81
Nonvested, end of period	204,570		31.27
LKE
Nonvested, beginning of period	318,963		$	29.65
Transfer between registrants	(24,993	)	30.52
Granted	86,987		33.73
Vested	(137,676	)	28.76
Nonvested, end of period	243,281		31.53

(a) Excludes 862,337 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:

	2016		2015		2014
PPL	$	30	$	28	$	11
PPL Electric	3		4		2
LKE	5		4		—

Performance Units, Valuation Assumptions

The weighted-average assumptions used in the model were:

	2016		2015		2014
Expected stock volatility	19.60	%	15.90	%	15.80	%
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:

	2016		2015		2014
PPL	$	35.74	$	36.76	$	34.55
PPL Electric	35.68		37.93		34.43
LKE	35.28		37.10		34.12

Performance Units, Activity Rollforward

Performance unit activity for 2016 was:

	Performance Units		Weighted- Average Grant Date Fair Value Per Share
PPL
Nonvested, beginning of period	993,540		$	33.09
Granted	471,401		35.74
Vested	(375,668	)	31.96
Forfeited	(18,737	)	33.22
Nonvested, end of period (a)	1,070,536		34.65

	Performance Units		Weighted- Average Grant Date Fair Value Per Share
PPL Electric
Nonvested, beginning of period	67,671		$	33.05
Granted	35,694		35.68
Vested	(23,880	)	31.89
Forfeited	(2,759	)	31.74
Nonvested, end of period	76,726		34.68
LKE
Nonvested, beginning of period	193,164		$	32.96
Transfer between registrants	(4,432	)	35.07
Granted	84,298		35.28
Vested	(70,048	)	31.74
Forfeited	(11,381	)	33.61
Nonvested, end of period	191,601		34.34

(a) Excludes 230,196 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, Activity Rollforward

Stock option activity for 2016 was:

	Number of Options		Weighted Average Exercise Price Per Share		Weighted- Average Remaining Contractual Term (years)	Aggregate Total Intrinsic Value
PPL
Outstanding at beginning of period	6,385,149		$	28.54
Exercised	(1,903,989	)	27.51
Outstanding and exercisable at end of period	4,481,160		28.98		4.4	$	29
PPL Electric
Outstanding at beginning of period	313,433		$	27.79
Exercised	(72,494	)	28.84
Outstanding and exercisable at end of period	240,939		27.48		4.5	$	2
LKE
Outstanding at beginning of period	425,656		$	26.08
Exercised	(363,760	)	26.12
Outstanding and exercisable at end of period	61,896		25.81		5.5	$	1

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:

	2016		2015		2014
PPL	$	27	$	33	$	30
PPL Electric	16		14		12
LKE	7		8		8

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

	2016		2015		2014
PPL	$	12	$	14	$	12
PPL Electric	7		6		5
LKE	3		3		3

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

At December 31, 2016, unrecognized compensation expense related to nonvested restricted stock, restricted stock units, and performance units was:

	Unrecognized Compensation Expense		Weighted- Average Period for Recognition
PPL	$	8	1.8
PPL Electric	1		1.8
LKE	1		1.6