Retirement and Postemployment Benefits (Weighted-Average Assumptions, Cost Trend Rates and Funded Status) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Multiemployer Plans (Numeric) [Abstract]
Contributions to specific plan	$ 73		$ 68		$ 59
Significant Specific Multiemployer Plan [Member]
Multiemployer Plans (Numeric) [Abstract]
Employer Identification Number	232004424
Plan number of pension plan	001
Contributions to specific plan	5		5		5
Threshold, as a percentage, of contributions by individual contributors to a specific plan that if exceeded require disclosure	5.00%
Number of subsidiaries whose contributions, on a combined basis, exceeded 5% of a specific plan's contributions	4
Threshold, as a percentage, of contributions to a specific plan that if exceeded require disclosure	5.00%
Expiration date of the collective-bargaining agreement	Sep. 18, 2016
Multiemployer Pension Plans [Member]
Multiemployer Plans (Numeric) [Abstract]
Multiemployer Plan, number of plans	70
Pension Benefits United States [Member]
Weighted Average Assumptions Used in the Valuation of the Benefit Obligations (Details) [Abstract]
Benefit obligations valuation discount rate	4.25%		5.12%
Benefit obligations valuation rate of compensation increase	3.92%		3.97%
Weighted Average Assumptions Used to Determine the Net Periodic Benefit Costs (Details) [Abstract]
Net periodic benefit costs discount rate	5.12%		4.22%		5.06%
Net periodic benefit costs rate of compensation increase	3.97%		3.98%		4.02%
Net periodic benefit costs expected return on plan assets	7.00%	[1]	7.03%	[1]	7.07%	[1]
Assumed Health Care Cost Trend Rates (Details) [Abstract]
Health care cost trend rate assumed for next year, obligations	7.20%		7.60%		8.00%
Health care cost trend rate assumed for next year, cost	7.60%		8.00%		8.50%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate), obligations	5.00%		5.00%		5.50%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate),cost	5.00%		5.50%		5.50%
Year that the rate reaches the ultimate trend rate, obligations	2019		2020		2020
Year that the rate reaches the ultimate trend rate, cost	2020		2019		2019
Change in Benefit Obligation [Roll Forward]
Benefit Obligation, beginning of period	4,591		5,046
Service cost	102		126		103
Interest cost	233		213		220
Participant contributions	0		0
Plan amendments	(7)		0
Actuarial (gain) loss	925		(540)
Curtailment	0		0
Termination benefits	13		0
Gross benefits paid	(248)	[2]	(254)
Currency conversion	0		0
Benefit Obligation, end of period	5,609		4,591		5,046
Change in Plan Assets [Roll Forward]
Balance at beginning of period	4,156		3,939
Actual return on plan assets	622		72
Employer contributions	102		399
Participant contributions	0		0
Gross benefits paid	(248)	[2]	(254)
Currency conversion	0		0
Balance at end of period	4,632		4,156		3,939
Funded Status, end of period	(977)		(435)
Lump sum cash payouts made to terminated vested employees	33		64
Amounts recognized in the Balance Sheets consist of: [Abstract]
Noncurrent asset	0		0
Current liability	(10)		(8)
Noncurrent liability	(967)		(427)
Net amount recognized, end of period	(977)		(435)
Amounts recognized in AOCI and regulatory asets/liabilities (pre-tax): [Abstract]
Prior service cost (credit)	41		69
Net actuarial (gain) loss	1,412		842
Total	1,453		911
Total accumulated benefit obligation for defined benefit pension plans	5,156		4,191
Changes in Plan Assets and Benefit Obligations Recognized in AOCI and Regulatory Assets/Liabilities by Type (Details) [Abstract]
AOCI	773		430
Regulatory assets/liabilities	680		481
Total	1,453		911
Pension Plans Where the Projected or Accumulated Benefit Obligation Exceed the Value of Plan Assets (Details) [Abstract]
Projected benefit obligations	5,609		4,591
Fair value of plan assets where the projected benefit obligations exceed the value of plan assets	4,632		4,156
Accumulated benefit obligation	5,156		572
Fair value of plan assets where the accumulated benefit obligations exceed the value of plan assets	4,632		431
Pension Benefits United States [Member] | Multiemployer Pension Plans [Member]
Multiemployer Plans (Numeric) [Abstract]
Contributions to specific plan	40		36		31
Pension Benefits United Kingdom [Member]
Weighted Average Assumptions Used in the Valuation of the Benefit Obligations (Details) [Abstract]
Benefit obligations valuation discount rate	3.85%		4.41%
Benefit obligations valuation rate of compensation increase	4.00%		4.00%
Weighted Average Assumptions Used to Determine the Net Periodic Benefit Costs (Details) [Abstract]
Net periodic benefit costs discount rate	4.41%		4.27%		5.24%
Net periodic benefit costs rate of compensation increase	4.00%		4.00%		4.00%
Net periodic benefit costs expected return on plan assets	7.19%	[1]	7.16%	[1]	7.17%	[1]
Change in Benefit Obligation [Roll Forward]
Benefit Obligation, beginning of period	8,143		7,888
Service cost	71		69		54
Interest cost	354		320		340
Participant contributions	16		15
Plan amendments	0		0
Actuarial (gain) loss	747		46
Curtailment	0		0
Termination benefits	0		3
Gross benefits paid	(411)		(375)
Currency conversion	(397)		177
Benefit Obligation, end of period	8,523		8,143		7,888
Change in Plan Assets [Roll Forward]
Balance at beginning of period	7,284		6,911
Actual return on plan assets	895		438
Employer contributions	311		134
Participant contributions	16		15
Gross benefits paid	(411)		(375)
Currency conversion	(361)		161
Balance at end of period	7,734		7,284		6,911
Funded Status, end of period	(789)		(859)
Amounts recognized in the Balance Sheets consist of: [Abstract]
Noncurrent asset	0		0
Current liability	(1)		0
Noncurrent liability	(788)		(859)
Net amount recognized, end of period	(789)		(859)
Amounts recognized in AOCI and regulatory asets/liabilities (pre-tax): [Abstract]
Prior service cost (credit)	0		0
Net actuarial (gain) loss	2,334		2,112
Total	2,334	[3]	2,112	[3]
Total accumulated benefit obligation for defined benefit pension plans	7,867		7,542
Changes in Plan Assets and Benefit Obligations Recognized in AOCI and Regulatory Assets/Liabilities by Type (Details) [Abstract]
Total	2,334	[3]	2,112	[3]
Pension Plans Where the Projected or Accumulated Benefit Obligation Exceed the Value of Plan Assets (Details) [Abstract]
Projected benefit obligations	8,523		8,143
Fair value of plan assets where the projected benefit obligations exceed the value of plan assets	7,734		7,284
Accumulated benefit obligation	3,592		3,441
Fair value of plan assets where the accumulated benefit obligations exceed the value of plan assets	3,321		3,131
Other Postretirement Benefits United States [Member]
Weighted Average Assumptions Used in the Valuation of the Benefit Obligations (Details) [Abstract]
Benefit obligations valuation discount rate	4.08%		4.91%
Benefit obligations valuation rate of compensation increase	3.86%		3.96%
Weighted Average Assumptions Used to Determine the Net Periodic Benefit Costs (Details) [Abstract]
Net periodic benefit costs discount rate	4.91%		4.00%		4.80%
Net periodic benefit costs rate of compensation increase	3.96%		3.97%		4.00%
Net periodic benefit costs expected return on plan assets	5.96%	[1]	5.94%	[1]	5.99%	[1]
Effect of One Percentage Point Change in Assumed Health Care Costs Trend Rate (Details) [Abstract]
Effect on accumulated postretirement benefit obligation of a one percentage point increase	5
Effect on accumulated postretirement benefit obligation of a one percentage point decrease	(5)
Change in Benefit Obligation [Roll Forward]
Benefit Obligation, beginning of period	662		722
Service cost	12		14		12
Interest cost	32		29		31
Participant contributions	12		12
Plan amendments	6		(4)
Actuarial (gain) loss	58		(54)
Curtailment	(1)		0
Termination benefits	0		0
Gross benefits paid	(56)		(57)
Currency conversion	0		0
Benefit Obligation, end of period	726		662		722
Change in Plan Assets [Roll Forward]
Balance at beginning of period	446		421
Actual return on plan assets	62		37
Employer contributions	16		30
Participant contributions	12		12
Gross benefits paid	(52)		(54)
Currency conversion	0		0
Balance at end of period	484		446		421
Funded Status, end of period	(242)		(216)
Amounts recognized in the Balance Sheets consist of: [Abstract]
Noncurrent asset	1		0
Current liability	(4)		(1)
Noncurrent liability	(239)		(215)
Net amount recognized, end of period	(242)		(216)
Amounts recognized in AOCI and regulatory asets/liabilities (pre-tax): [Abstract]
Prior service cost (credit)	(4)		(11)
Net actuarial (gain) loss	54		33
Total	50		22
Changes in Plan Assets and Benefit Obligations Recognized in AOCI and Regulatory Assets/Liabilities by Type (Details) [Abstract]
AOCI	26		19
Regulatory assets/liabilities	24		3
Total	50		22
Other Postretirement Benefits United States [Member] | Multiemployer Other Postretirement Medical Plans [Member]
Multiemployer Plans (Numeric) [Abstract]
Contributions to specific plan	33		32		28
PPL Energy Supply LLC [Member]
Multiemployer Plans (Numeric) [Abstract]
Multiemployer Plan, period contributions	73		68		59
PPL Energy Supply LLC [Member] | Significant Specific Multiemployer Plan [Member]
Multiemployer Plans (Numeric) [Abstract]
Employer Identification Number	232004424
Plan number of pension plan	001
Contributions to specific plan	5		5		5
Threshold, as a percentage, of contributions by individual contributors to a specific plan that if exceeded require disclosure	5.00%
Number of subsidiaries whose contributions, on a combined basis, exceeded 5% of a specific plan's contributions	4
Threshold, as a percentage, of contributions to a specific plan that if exceeded require disclosure	5.00%
Expiration date of the collective-bargaining agreement	Sep. 18, 2016
PPL Energy Supply LLC [Member] | Multiemployer Pension Plans [Member]
Multiemployer Plans (Numeric) [Abstract]
Multiemployer Plan, number of plans	70
PPL Energy Supply LLC [Member] | Pension Benefits United States [Member]
Weighted Average Assumptions Used in the Valuation of the Benefit Obligations (Details) [Abstract]
Benefit obligations valuation discount rate	4.28%		5.18%
Benefit obligations valuation rate of compensation increase	4.03%		3.94%
Weighted Average Assumptions Used to Determine the Net Periodic Benefit Costs (Details) [Abstract]
Net periodic benefit costs discount rate	5.18%		4.25%		5.12%
Net periodic benefit costs rate of compensation increase	3.94%		3.95%		4.00%
Net periodic benefit costs expected return on plan assets	7.00%	[1]	7.00%	[1]	7.00%	[1]
Assumed Health Care Cost Trend Rates (Details) [Abstract]
Health care cost trend rate assumed for next year, obligations	7.20%		7.60%		8.00%
Health care cost trend rate assumed for next year, cost	7.60%		8.00%		8.50%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate), obligations	5.00%		5.00%		5.50%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate),cost	5.00%		5.50%		5.50%
Year that the rate reaches the ultimate trend rate, obligations	2019		2020		2020
Year that the rate reaches the ultimate trend rate, cost	2020		2019		2019
Change in Benefit Obligation [Roll Forward]
Benefit Obligation, beginning of period	163		176
Service cost	5		7		6
Interest cost	9		8		7
Plan amendments	0		0
Actuarial (gain) loss	38		(23)
Curtailment	0		0
Gross benefits paid	(5)		(5)
Benefit Obligation, end of period	210		163		176
Change in Plan Assets [Roll Forward]
Balance at beginning of period	147		149
Actual return on plan assets	22		3
Employer contributions	6		0
Gross benefits paid	(5)		(5)
Balance at end of period	170		147		149
Funded Status, end of period	(40)		(16)
Amounts recognized in the Balance Sheets consist of: [Abstract]
Current liability	0		0
Noncurrent liability	(40)		(16)
Net amount recognized, end of period	(40)		(16)
Amounts recognized in AOCI and regulatory asets/liabilities (pre-tax): [Abstract]
Prior service cost (credit)	0		0
Net actuarial (gain) loss	59		34
Total	59		34
Total accumulated benefit obligation for defined benefit pension plans	210		163
Changes in Plan Assets and Benefit Obligations Recognized in AOCI and Regulatory Assets/Liabilities by Type (Details) [Abstract]
Total	59		34
PPL Energy Supply LLC [Member] | Pension Benefits United States [Member] | PPL Services Funded Status Allocation [Member]
Change in Plan Assets [Roll Forward]
Funded Status, end of period	259		96
PPL Energy Supply LLC [Member] | Pension Benefits United States [Member] | Multiemployer Pension Plans [Member]
Multiemployer Plans (Numeric) [Abstract]
Multiemployer Plan, period contributions	40		36		31
PPL Energy Supply LLC [Member] | Other Postretirement Benefits United States [Member]
Weighted Average Assumptions Used in the Valuation of the Benefit Obligations (Details) [Abstract]
Benefit obligations valuation discount rate	3.81%		4.51%
Benefit obligations valuation rate of compensation increase	4.03%		3.94%
Weighted Average Assumptions Used to Determine the Net Periodic Benefit Costs (Details) [Abstract]
Net periodic benefit costs discount rate	4.51%		3.77%		4.60%
Net periodic benefit costs rate of compensation increase	3.94%		3.95%		4.00%
Change in Benefit Obligation [Roll Forward]
Benefit Obligation, beginning of period	12		17
Service cost	0		1		1
Interest cost	1		0		1
Plan amendments	0		(4)
Actuarial (gain) loss	(1)		(1)
Curtailment	(1)		0
Gross benefits paid	(1)		(1)
Benefit Obligation, end of period	10		12		17
Change in Plan Assets [Roll Forward]
Balance at beginning of period	0		0
Actual return on plan assets	0		0
Employer contributions	1		1
Gross benefits paid	(1)		(1)
Balance at end of period	0		0		0
Funded Status, end of period	(10)		(12)
Amounts recognized in the Balance Sheets consist of: [Abstract]
Current liability	(1)		(1)
Noncurrent liability	(9)		(11)
Net amount recognized, end of period	(10)		(12)
Amounts recognized in AOCI and regulatory asets/liabilities (pre-tax): [Abstract]
Prior service cost (credit)	(4)		(5)
Net actuarial (gain) loss	0		1
Total	(4)		(4)
Changes in Plan Assets and Benefit Obligations Recognized in AOCI and Regulatory Assets/Liabilities by Type (Details) [Abstract]
Total	(4)		(4)
PPL Energy Supply LLC [Member] | Other Postretirement Benefits United States [Member] | PPL Services Funded Status Allocation [Member]
Change in Plan Assets [Roll Forward]
Funded Status, end of period	34		35
PPL Energy Supply LLC [Member] | Other Postretirement Benefits United States [Member] | Multiemployer Other Postretirement Medical Plans [Member]
Multiemployer Plans (Numeric) [Abstract]
Multiemployer Plan, period contributions	33		32		28
PPL Electric Utilities Corp [Member] | Pension Benefits United States [Member] | PPL Services Funded Status Allocation [Member]
Change in Plan Assets [Roll Forward]
Funded Status, end of period	212		96
PPL Electric Utilities Corp [Member] | Other Postretirement Benefits United States [Member] | PPL Services Funded Status Allocation [Member]
Change in Plan Assets [Roll Forward]
Funded Status, end of period	40		41
LG And E And KU Energy LLC [Member] | Pension Benefits United States [Member]
Weighted Average Assumptions Used in the Valuation of the Benefit Obligations (Details) [Abstract]
Benefit obligations valuation discount rate	4.25%		5.18%
Benefit obligations valuation rate of compensation increase	3.50%		4.00%
Weighted Average Assumptions Used to Determine the Net Periodic Benefit Costs (Details) [Abstract]
Net periodic benefit costs discount rate	5.18%		4.24%		5.09%
Net periodic benefit costs rate of compensation increase	4.00%		4.00%		4.00%
Net periodic benefit costs expected return on plan assets	7.00%	[1]	7.10%	[1]	7.25%	[1]
Assumed Health Care Cost Trend Rates (Details) [Abstract]
Health care cost trend rate assumed for next year, obligations	7.20%		7.60%		8.00%
Health care cost trend rate assumed for next year, cost	7.60%		8.00%		8.50%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate), obligations	5.00%		5.00%		5.50%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate),cost	5.00%		5.50%		5.50%
Year that the rate reaches the ultimate trend rate, obligations	2019		2020		2020
Year that the rate reaches the ultimate trend rate, cost	2020		2019		2019
Change in Benefit Obligation [Roll Forward]
Benefit Obligation, beginning of period	1,328		1,487
Service cost	21		26		22
Interest cost	66		62		64
Participant contributions	0		0
Plan amendments	23	[4]	0
Actuarial (gain) loss	253		(177)
Gross benefits paid	(83)	[5]	(70)
Benefit Obligation, end of period	1,608		1,328		1,487
Change in Plan Assets [Roll Forward]
Balance at beginning of period	1,173		1,070
Actual return on plan assets	173		21
Employer contributions	38		152
Participant contributions	0		0
Gross benefits paid	(83)	[5]	(70)
Balance at end of period	1,301		1,173		1,070
Funded Status, end of period	(307)		(155)
Lump sum cash payouts made to terminated vested employees	33		21
Amounts recognized in the Balance Sheets consist of: [Abstract]
Current liability	(3)		(3)
Noncurrent liability	(304)		(152)
Net amount recognized, end of period	(307)		(155)
Amounts recognized in AOCI and regulatory asets/liabilities (pre-tax): [Abstract]
Prior service cost (credit)	43		24
Net actuarial (gain) loss	354		205
Total	397		229
Total accumulated benefit obligation for defined benefit pension plans	1,461		1,176
Changes in Plan Assets and Benefit Obligations Recognized in AOCI and Regulatory Assets/Liabilities by Type (Details) [Abstract]
AOCI	65		(19)
Regulatory assets/liabilities	332		248
Total	397		229
Pension Plans Where the Projected or Accumulated Benefit Obligation Exceed the Value of Plan Assets (Details) [Abstract]
Projected benefit obligations	1,608		1,328
Fair value of plan assets where the projected benefit obligations exceed the value of plan assets	1,301		1,173
Accumulated benefit obligation	1,461		350
Fair value of plan assets where the accumulated benefit obligations exceed the value of plan assets	1,301		284
LG And E And KU Energy LLC [Member] | Other Postretirement Benefits United States [Member]
Weighted Average Assumptions Used in the Valuation of the Benefit Obligations (Details) [Abstract]
Benefit obligations valuation discount rate	4.06%		4.91%
Benefit obligations valuation rate of compensation increase	3.50%		4.00%
Weighted Average Assumptions Used to Determine the Net Periodic Benefit Costs (Details) [Abstract]
Net periodic benefit costs discount rate	4.91%		3.99%		4.78%
Net periodic benefit costs rate of compensation increase	4.00%		4.00%		4.00%
Net periodic benefit costs expected return on plan assets	6.75%	[1]	6.76%	[1]	7.02%	[1]
Effect of One Percentage Point Change in Assumed Health Care Costs Trend Rate (Details) [Abstract]
Effect on accumulated postretirement benefit obligation of a one percentage point increase	4
Effect on accumulated postretirement benefit obligation of a one percentage point decrease	(4)
Change in Benefit Obligation [Roll Forward]
Benefit Obligation, beginning of period	193		209
Service cost	4		5		4
Interest cost	9		8		9
Participant contributions	7		7
Plan amendments	6		0
Actuarial (gain) loss	32		(18)
Gross benefits paid	(17)		(18)
Benefit Obligation, end of period	234		193		209
Change in Plan Assets [Roll Forward]
Balance at beginning of period	74		68
Actual return on plan assets	10		1
Employer contributions	8		16
Participant contributions	7		7
Gross benefits paid	(17)		(18)
Balance at end of period	82		74		68
Funded Status, end of period	(152)		(119)
Amounts recognized in the Balance Sheets consist of: [Abstract]
Noncurrent asset	2		0
Current liability	(3)		0
Noncurrent liability	(151)		(119)
Net amount recognized, end of period	(152)		(119)
Amounts recognized in AOCI and regulatory asets/liabilities (pre-tax): [Abstract]
Prior service cost (credit)	12		8
Net actuarial (gain) loss	(4)		(30)
Total	8		(22)
Changes in Plan Assets and Benefit Obligations Recognized in AOCI and Regulatory Assets/Liabilities by Type (Details) [Abstract]
AOCI	8		0
Regulatory assets/liabilities	0		(22)
Total	8		(22)
Louisville Gas And Electric Co [Member] | Pension Benefits United States [Member]
Weighted Average Assumptions Used in the Valuation of the Benefit Obligations (Details) [Abstract]
Benefit obligations valuation discount rate	4.20%		5.13%
Weighted Average Assumptions Used to Determine the Net Periodic Benefit Costs (Details) [Abstract]
Net periodic benefit costs discount rate	5.13%		4.20%		5.00%
Net periodic benefit costs expected return on plan assets	7.00%	[1]	7.10%	[1]	7.25%	[1]
Change in Benefit Obligation [Roll Forward]
Benefit Obligation, beginning of period	291		331
Service cost	1		2		2
Interest cost	15		14		14
Plan amendments	9	[6]	0
Actuarial (gain) loss	36		(35)
Gross benefits paid	(21)	[7]	(21)
Benefit Obligation, end of period	331		291		331
Change in Plan Assets [Roll Forward]
Balance at beginning of period	281		287
Actual return on plan assets	41		4
Employer contributions	0		11
Gross benefits paid	(21)	[7]	(21)
Balance at end of period	301		281		287
Funded Status, end of period	(30)		(10)
Lump sum cash payouts made to terminated vested employees	8		7
Amounts recognized in the Balance Sheets consist of: [Abstract]
Noncurrent liability	(30)		(10)
Net amount recognized, end of period	(30)		(10)
Amounts recognized in AOCI and regulatory asets/liabilities (pre-tax): [Abstract]
Prior service cost (credit)	22		15
Net actuarial (gain) loss	98		90
Total	120		105
Total accumulated benefit obligation for defined benefit pension plans	330		288
Changes in Plan Assets and Benefit Obligations Recognized in AOCI and Regulatory Assets/Liabilities by Type (Details) [Abstract]
Total	120		105
Louisville Gas And Electric Co [Member] | Pension Benefits United States [Member] | LKE Funded Status Allocation [Member]
Change in Plan Assets [Roll Forward]
Funded Status, end of period	27		9
Louisville Gas And Electric Co [Member] | Other Postretirement Benefits United States [Member] | LKE Funded Status Allocation [Member]
Change in Plan Assets [Roll Forward]
Funded Status, end of period	85		73
Kentucky Utilities Co [Member] | Pension Benefits United States [Member] | LKE Funded Status Allocation [Member]
Change in Plan Assets [Roll Forward]
Funded Status, end of period	59		11
Kentucky Utilities Co [Member] | Other Postretirement Benefits United States [Member] | LKE Funded Status Allocation [Member]
Change in Plan Assets [Roll Forward]
Funded Status, end of period	$ 52		$ 42

[1] The expected long-term rates of return for pension and other postretirement benefits are based on management's projections using a best-estimate of expected returns, volatilities and correlations for each asset class. Each plan's specific current and expected asset allocations are also considered in developing a reasonable return assumption.

[2] Certain U.S. pension plans offered a limited-time program in 2014 and 2013 during which terminated vested participants could elect to receive their accrued pension benefit as a one-time lump sum payment. Gross benefits paid includes $33 million and $64million of lump-sum cash payments made to terminated vested participants in 2014 and 2013 in connection with these offerings.

[3] WPD is not subject to accounting for the effects of certain types of regulation as prescribed by GAAP. As a result, WPD does not record regulatory assets/liabilities.

[4] (a)The plans were amended in December2014 to enhance the early retirement factors for all plan participants retiring on or after January 1, 2015. These modifications resulted in an increase of $23 million in the plans’ projected benefit obligations as of December 31, 2014.

[5] Certain LKE pension plans offered a limited-time program in 2014 and 2013 during which terminated vested participants could elect to receive their accrued pension benefit as a one-time lump-sum payment. The gross benefits paid includes $33 million and $21million of lump-sum cash payments made to terminated vested participants in 2014 and 2013 in connection with these offerings.

[6] (a)The plan was amended in December2014 to enhance the early retirement factors for all plan participants retiring on or after January 1, 2015.  This modification resulted in an increase of $9 million in the plan’s projected benefit obligation as of December 31, 2014.

[7] LG&E's pension plan offered a limited-time program in 2014 and 2013 during which terminated vested participants could elect to receive their accrued pension benefit as a one-time lump-sum payment. The gross benefits paid includes $8 million and $7million of lump-sum cash payments made to terminated vested participants in 2014 and 2013 in connection with these offerings.