Defined Benefits (Tables)

3 Months Ended

Mar. 31, 2019

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule Of Net Periodic Defined Benefit Costs (Credits)

Following are the net periodic defined benefit costs (credits) of the plans sponsored by PPL and its subsidiaries, LKE, and LG&E for the periods ended March 31:

	Pension Benefits
	Three Months
	U.S.						U.K.
	2019			2018			2019			2018
PPL
Service cost	$	13		$	16		$	17		$	21
Interest cost	41			39			47			47
Expected return on plan assets	(61		)	(62		)	(148		)	(150		)
Amortization of:
Prior service cost	2			2			—			—
Actuarial loss	13			22			24			39
Net periodic defined benefit costs (credits) before settlements	8			17			(60		)	(43		)
Settlements	1			—			—			—
Net periodic defined benefit costs (credits)	$	9		$	17		$	(60	)	$	(43	)

	Other Postretirement Benefits
	Three Months
	2019			2018
PPL
Service cost	$	1		$	1
Interest cost	6			3
Expected return on plan assets	(5		)	(4		)
Amortization of prior service cost	—			(1		)
Net periodic defined benefit costs	$	2		$	(1	)

PPL Electric Utilities Corp [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Allocation of Net Periodic Benefit Costs

For the periods ended March 31, PPL Services allocated the following net periodic defined benefit costs to PPL Electric, and LKE allocated the following net periodic defined benefit costs to LG&E and KU:

	Three Months
	2019		2018
PPL Electric	$	3	$	4
LG&E	1		2
KU	—		1

LG And E And KU Energy LLC [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule Of Net Periodic Defined Benefit Costs (Credits)

Following are the net periodic defined benefit costs (credits) of the plans sponsored by PPL and its subsidiaries, LKE, and LG&E for the periods ended March 31:

	Pension Benefits
	Three Months
	2019			2018
LKE
Service cost	$	6		$	7
Interest cost	16			16
Expected return on plan assets	(25		)	(26		)
Amortization of:
Prior service cost	2			2
Actuarial loss (a)	4			10
Net periodic defined benefit costs	$	3		$	9

(a) As a result of treatment approved by the KPSC, the difference between actuarial loss calculated in accordance with LKE's accounting policy and actuarial loss calculated using a 15-year amortization period was $4 million for the three months ended March 31, 2018. This difference is recorded as a regulatory asset.

	Other Postretirement Benefits
	Three Months
	2019			2018
LKE
Service cost	$	1		$	1
Interest cost	2			2
Expected return on plan assets	(2		)	(2		)
Net periodic defined benefit costs	$	1		$	1

Louisville Gas And Electric Co [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule Of Net Periodic Defined Benefit Costs (Credits)

Following are the net periodic defined benefit costs (credits) of the plans sponsored by PPL and its subsidiaries, LKE, and LG&E for the periods ended March 31:

	Pension Benefits
	Three Months
	2019			2018
LG&E
Interest cost	3			3
Expected return on plan assets	(6		)	(5		)
Amortization of:
Prior service cost	1			1
Actuarial loss (a)	2			2
Net periodic defined benefit costs	$	—		$	1

(a) As a result of treatment approved by the KPSC, the difference between actuarial loss calculated in accordance with LG&E's accounting policy and actuarial loss calculated using a 15-year amortization period was $1 million for the three months ended March 31, 2018. This difference is recorded as a regulatory asset.

Allocation of Net Periodic Benefit Costs

For the periods ended March 31, PPL Services allocated the following net periodic defined benefit costs to PPL Electric, and LKE allocated the following net periodic defined benefit costs to LG&E and KU:

	Three Months
	2019		2018
PPL Electric	$	3	$	4
LG&E	1		2
KU	—		1

Kentucky Utilities Co [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Allocation of Net Periodic Benefit Costs

For the periods ended March 31, PPL Services allocated the following net periodic defined benefit costs to PPL Electric, and LKE allocated the following net periodic defined benefit costs to LG&E and KU:

	Three Months
	2019		2018
PPL Electric	$	3	$	4
LG&E	1		2
KU	—		1