Defined Benefits (Tables)

3 Months Ended

Mar. 31, 2021

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. (a)
	2021		2020		2021		2020
PPL
Service cost	$	13	$	13	$	25	$	23
Interest cost	32		38		29		36
Expected return on plan assets	(61)		(60)		(177)		(158)
Amortization of:
Prior service cost	2		2		—		—
Actuarial loss	25		20		54		54
Net periodic defined benefit costs (credits)	$	11	$	13	$	(69)	$	(45)

(a)    U.K. amounts are reflected in discontinued operations. See Note 9 for additional information on the share purchase agreement to sell the U.K. utility business.

	Other Postretirement Benefits
	Three Months
	2021		2020
PPL
Service cost	$	2	$	2
Interest cost	4		5
Expected return on plan assets	(5)		(5)
Net periodic defined benefit costs	$	1	$	2
LKE
Service cost	$	1	$	1
Interest cost	2		2
Expected return on plan assets	(2)		(2)
Net periodic defined benefit costs	$	1	$	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
	2021		2020
PPL Electric	$	—	$	3
LG&E	3		3
KU	1		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
	2021		2020
LKE
Service cost	$	6	$	5
Interest cost	14		16
Expected return on plan assets	(24)		(24)
Amortization of:
Prior service cost	2		2
Actuarial loss (a)	11		9
Net periodic defined benefit costs (credits)	$	9	$	8

(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 $3 million for the three months ended March 31, 2021 and 2020.

	Other Postretirement Benefits
	Three Months
	2021		2020
PPL
Service cost	$	2	$	2
Interest cost	4		5
Expected return on plan assets	(5)		(5)
Net periodic defined benefit costs	$	1	$	2
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:.

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
	2021		2020
PPL Electric	$	—	$	3
LG&E	3		3
KU	1		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
	2021		2020
PPL Electric	$	—	$	3
LG&E	3		3
KU	1		1