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Retirement and Postemployment Benefits | 12 Months Ended
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Dec. 31, 2020
Retirement Benefits [Abstract] |
Retirement and Postemployment Benefits | (All Registrants) Defined Benefits Certain employees of PPL's domestic subsidiaries are eligible for pension benefits under non-contributory defined benefit pension plans with benefits based on length of service and final average pay, as defined by the plans. Effective January 1, 2012, PPL's primary defined benefit pension plan was closed to all newly hired salaried employees. Effective July 1, 2014, PPL's primary defined benefit pension plan was closed to all newly hired bargaining unit employees. Newly hired employees are eligible to participate in the PPL Retirement Savings Plan, a 401(k) savings plan with enhanced employer contributions. The defined benefit pension plans of LKE and its subsidiaries were closed to new salaried and bargaining unit employees hired after December 31, 2005. Employees hired after December 31, 2005 receive additional company contributions above the standard matching contributions to their savings plans. The pension plans sponsored by LKE and LG&E were merged effective January 1, 2020 into the LG&E and KU Pension Plan. The merged plan is sponsored by LKE. LG&E and KU participate in this plan. Effective April 1, 2010, the principal defined benefit pension plan applicable to WPD (South West) and WPD (South Wales) was closed to most new employees, except for those meeting specific grandfathered participation rights. WPD Midlands' defined benefit plan had been closed to new members, except for those meeting specific grandfathered participation rights, prior to acquisition. New employees not eligible to participate in the plans are offered benefits under a defined contribution plan. PPL and certain of its subsidiaries also provide supplemental retirement benefits to executives and other key management employees through unfunded nonqualified retirement plans. Certain employees of PPL's domestic subsidiaries are eligible for certain health care and life insurance benefits upon retirement through contributory plans. Effective January 1, 2014, the PPL Postretirement Medical Plan was closed to all newly hired salaried employees. Effective July 1, 2014, the PPL Postretirement Medical Plan was closed to all newly hired bargaining unit employees. Postretirement health benefits may be paid from 401(h) accounts established as part of the PPL Retirement Plan and the LG&E and KU Pension Plan within the PPL Services Corporation Master Trust, funded VEBA trusts and company funds. WPD does not sponsor any postretirement benefit plans other than pensions. (PPL) The following table provides the components of net periodic defined benefit costs (credits) for PPL's domestic (U.S.) and WPD's (U.K.) pension and other postretirement benefit plans for the years ended December 31.
| Pension Benefits |  |  |  |  |  |
| U.S. |  | U.K. |  | Other Postretirement Benefits
| 2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018
Net periodic defined benefit costs (credits): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost | $ | 56 |  |  | $ | 50 |  |  | $ | 62 |  |  | $ | 89 |  |  | $ | 68 |  |  | $ | 82 |  |  | $ | 6 |  |  | $ | 6 |  |  | $ | 7 |
Interest cost | 146 |  |  | 164 |  |  | 156 |  |  | 143 |  |  | 187 |  |  | 185 |  |  | 19 |  |  | 22 |  |  | 21 |
Expected return on plan assets | (246) |  |  | (245) |  |  | (249) |  |  | (622) |  |  | (588) |  |  | (587) |  |  | (21) |  |  | (18) |  |  | (23) |
Amortization of: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prior service cost (credit) | 9 |  |  | 8 |  |  | 10 |  |  | 1 |  |  | 1 |  |  | — |  |  | 1 |  |  | (1) |  |  | (1) |
Actuarial (gain) loss | 89 |  |  | 56 |  |  | 84 |  |  | 213 |  |  | 92 |  |  | 151 |  |  | — |  |  | 1 |  |  | — |
Net periodic defined benefit costs (credits) prior to settlements and termination benefits | 54 |  |  | 33 |  |  | 63 |  |  | (176) |  |  | (240) |  |  | (169) |  |  | 5 |  |  | 10 |  |  | 4 |
Settlements (a) | 23 |  |  | 1 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Net periodic defined benefit costs (credits) | $ | 77 |  |  | $ | 34 |  |  | $ | 63 |  |  | $ | (176) |  |  | $ | (240) |  |  | $ | (169) |  |  | $ | 5 |  |  | $ | 10 |  |  | $ | 4 |
Other Changes in Plan Assets and Benefit Obligations Recognized in OCI and Regulatory Assets/Liabilities - Gross: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Settlement | (23) |  |  | (1) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Net (gain) loss | (221) |  |  | (121) |  |  | 157 |  |  | 459 |  |  | 723 |  |  | 201 |  |  | (6) |  |  | (18) |  |  | 8 |
Prior service cost (credit) | 1 |  |  | 2 |  |  | 1 |  |  | — |  |  | — |  |  | 13 |  |  | 5 |  |  | — |  |  | — |
Amortization of: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prior service (cost) credit | (9) |  |  | (8) |  |  | (10) |  |  | (1) |  |  | (1) |  |  | — |  |  | (1) |  |  | 1 |  |  | 1 |
Actuarial gain (loss) | (89) |  |  | (56) |  |  | (84) |  |  | (213) |  |  | (92) |  |  | (151) |  |  | — |  |  | (1) |  |  | — |
Total recognized in OCI and regulatory assets/liabilities (b) | (341) |  |  | (184) |  |  | 64 |  |  | 245 |  |  | 630 |  |  | 63 |  |  | (2) |  |  | (18) |  |  | 9 |
Total recognized in net periodic defined benefit costs, OCI and regulatory assets/liabilities (b) | $ | (264) |  |  | $ | (150) |  |  | $ | 127 |  |  | $ | 69 |  |  | $ | 390 |  |  | $ | (106) |  |  | $ | 3 |  |  | $ | (8) |  |  | $ | 13 |
(a)Includes a settlement charge for a retired PPL executive as well as a settlement charge incurred as a result of the amount of lump sum payment distributions from the LKE qualified pension plan. In accordance with existing regulatory accounting treatment, LG&E and KU have primarily maintained the settlement charge in regulatory assets to be amortized in accordance with existing regulatory practice. The portion of the settlement attributed to LKE's operations outside of the jurisdiction of the KPSC has been charged to expense. (b)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. For PPL's U.S. pension benefits and for other postretirement benefits, the amounts recognized in OCI and regulatory assets/liabilities for the years ended December 31 were as follows:
| U.S. Pension Benefits |  | Other Postretirement Benefits
| 2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018
OCI | $ | (428) |  |  | $ | (194) |  |  | $ | 90 |  |  | $ | (12) |  |  | $ | (13) |  |  | $ | 20 |
Regulatory assets/liabilities | 87 |  |  | 10 |  |  | (26) |  |  | 10 |  |  | (5) |  |  | (11) |
Total recognized in OCI and regulatory assets/liabilities | $ | (341) |  |  | $ | (184) |  |  | $ | 64 |  |  | $ | (2) |  |  | $ | (18) |  |  | $ | 9 |
(LKE) The following table provides the components of net periodic defined benefit costs for LKE's pension and other postretirement benefit plans for the years ended December 31.
| Pension Benefits |  | Other Postretirement Benefits
| 2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018
Net periodic defined benefit costs (credits): |  |  |  |  |  |  |  |  |  |  |
Service cost | $ | 24 |  |  | $ | 22 |  |  | $ | 25 |  |  | $ | 4 |  |  | $ | 4 |  |  | $ | 4 |
Interest cost | 57 |  |  | 66 |  |  | 63 |  |  | 7 |  |  | 8 |  |  | 8 |
Expected return on plan assets | (101) |  |  | (101) |  |  | (102) |  |  | (9) |  |  | (8) |  |  | (9) |
Amortization of: |  |  |  |  |  |  |  |  |  |  |
Prior service cost | 8 |  |  | 8 |  |  | 9 |  |  | 1 |  |  | 1 |  |  | 1 |
Actuarial (gain) loss (a) | 41 |  |  | 22 |  |  | 35 |  |  | (1) |  |  | (1) |  |  | — |
Net periodic defined benefit costs (credits) before settlements | $ | 29 |  |  | $ | 17 |  |  | $ | 30 |  |  | $ | 2 |  |  | $ | 4 |  |  | $ | 4 |
Settlements (b) | 15 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Net periodic defined benefit costs (credits) (c) | $ | 44 |  |  | $ | 17 |  |  | $ | 30 |  |  | $ | 2 |  |  | $ | 4 |  |  | $ | 4 |
Other Changes in Plan Assets and Benefit Obligations Recognized in OCI and Regulatory Assets/Liabilities - Gross: |  |  |  |  |  |  |  |  |  |  |
Settlements | $ | (15) |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Net (gain) loss | (29) |  |  | (37) |  |  | 40 |  |  | (1) |  |  | (14) |  |  | 1 |
Prior service cost | 2 |  |  | 2 |  |  | — |  |  | 5 |  |  | — |  |  | — |
Amortization of: |  |  |  |  |  |  |  |  |  |  |
Prior service credit | (8) |  |  | (8) |  |  | (9) |  |  | (1) |  |  | (1) |  |  | (1) |
Actuarial gain (loss) | (41) |  |  | (22) |  |  | (35) |  |  | 1 |  |  | 1 |  |  | — |
Total recognized in OCI and regulatory assets/liabilities | (91) |  |  | (65) |  |  | (4) |  |  | 4 |  |  | (14) |  |  | — |
Total recognized in net periodic defined benefit costs, OCI and regulatory assets/liabilities | $ | (47) |  |  | $ | (48) |  |  | $ | 26 |  |  | $ | 6 |  |  | $ | (10) |  |  | $ | 4 |
(a)As a result of the 2014 Kentucky rate case settlement that became effective July 1, 2015, the difference between actuarial (gain)/loss calculated in accordance with LKE's pension accounting policy and actuarial (gain)/loss calculated using a 15 year amortization period was $11 million in 2020, $5 million in 2019 and $11 million in 2018. (b)Due to the amount of lump sum payment distributions from the LKE qualified pension plan, a settlement charge of $15 million for the year ended December 31, 2020 was incurred. In accordance with existing regulatory accounting treatment, LG&E and KU have primarily maintained the settlement charge in regulatory assets to be amortized in accordance with existing regulatory practice. The portion of the settlement attributable to LKE’s operations outside of the jurisdiction of the KPSC has been charged to expense. (c)Due to the amount of lump sum payment distributions from the LG&E qualified pension plan, settlement charges of $5 million in 2019 and $6 million in 2018 were incurred. In accordance with existing regulatory accounting treatment, LG&E has maintained the settlement charge in regulatory assets. The amount will be amortized in accordance with existing regulatory practice. For LKE's pension and other postretirement benefits, the amounts recognized in OCI and regulatory assets/liabilities for the years ended December 31 were as follows:
| Pension Benefits |  | Other Postretirement Benefits
| 2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018
OCI | $ | (5) |  |  | $ | 13 |  |  | $ | (25) |  |  | $ | (2) |  |  | $ | (7) |  |  | $ | 4 |
Regulatory assets/liabilities | (86) |  |  | (78) |  |  | 21 |  |  | 6 |  |  | (7) |  |  | (4) |
Total recognized in OCI and regulatory assets/liabilities | $ | (91) |  |  | $ | (65) |  |  | $ | (4) |  |  | $ | 4 |  |  | $ | (14) |  |  | $ | — |
(LG&E) The following table provides the components of net periodic defined benefit costs for LG&E's pension benefit plan for the years ended December 31.
| Pension Benefits
| 2019 (a) |  | 2018
Net periodic defined benefit costs (credits): |  |  |
Service cost | $ | 1 |  |  | $ | 1 |
Interest cost | 11 |  |  | 12 |
Expected return on plan assets | (21) |  |  | (22) |
Amortization of: |  |  |
Prior service cost (credit) | 5 |  |  | 5 |
Actuarial loss (b) | 9 |  |  | 7 |
Net periodic defined benefit costs (credits) (c) | $ | 5 |  |  | $ | 3 |
Other Changes in Plan Assets and Benefit Obligations Recognized in Regulatory Assets - Gross: |  |  |
Net (gain) loss | $ | (19) |  |  | $ | 22 |
Prior service cost | — |  |  | — |
Amortization of: |  |  |
Prior service credit | (5) |  |  | (5) |
Actuarial gain | (9) |  |  | (7) |
Total recognized in regulatory assets/liabilities | (33) |  |  | 10 |
Total recognized in net periodic defined benefit costs and regulatory assets | $ | (28) |  |  | $ | 13 |
(a)The pension plans sponsored by LKE and LG&E were merged effective January 1, 2020 into the LG&E and KU Pension Plan, sponsored by LKE. (b)As a result of the 2014 Kentucky rate case settlement that became effective July 1, 2015, the difference between actuarial (gain)/loss calculated in accordance with LG&E's pension accounting policy and actuarial (gain)/loss calculated using a 15 year amortization period was $3 million in 2019 and $2 million in 2018. (c)Due to the amount of lump sum payment distributions from the LG&E qualified pension plan, settlement charges of $5 million in 2019 and $6 million in 2018 were incurred. In accordance with existing regulatory accounting treatment, LG&E has maintained the settlement charge in regulatory assets. The amount will be amortized in accordance with existing regulatory practice. (All Registrants) The following net periodic defined benefit costs (credits) were charged to expense or regulatory assets, excluding amounts charged to construction and other non-expense accounts. The U.K. pension benefits apply to PPL only.
| Pension Benefits |  |  |  |  |  |
| U.S. |  | U.K. |  | Other Postretirement Benefits
| 2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018
PPL | $ | 40 |  |  | $ | 18 |  |  | $ | 40 |  |  | $ | (237) |  |  | $ | (287) |  |  | $ | (226) |  |  | $ | 4 |  |  | $ | 8 |  |  | $ | 2 |
PPL Electric (a) | (2) |  |  | (4) |  |  | 4 |  |  |  |  |  |  |  |  | 2 |  |  | 4 |  |  | (1) |
LKE (b) | 20 |  |  | 12 |  |  | 21 |  |  |  |  |  |  |  |  | 1 |  |  | 2 |  |  | 3 |
LG&E (a) (b) | 4 |  |  | 3 |  |  | 4 |  |  |  |  |  |  |  |  | 2 |  |  | 2 |  |  | 2 |
KU (a) (b) | 1 |  |  | (1) |  |  | 2 |  |  |  |  |  |  |  |  | — |  |  | — |  |  | 1 |
(a)PPL Electric and KU do not directly sponsor any defined benefit plans. PPL Electric and KU were allocated these costs of defined benefit plans sponsored by PPL Services (for PPL Electric) and by LKE (for KU), based on their participation in those plans, which management believes are reasonable. KU is also allocated costs of defined benefit plans from LKS for defined benefit plans sponsored by LKE. Effective January 1, 2020, the LKE and LG&E defined benefit pension plans were merged into a combined defined benefit pension plan, sponsored by LKE, therefore LG&E and KU do not directly sponsor any defined benefit plans. LG&E and KU were allocated these costs of defined benefit plans sponsored by LKE, based on their participation in those plans, which management believes are reasonable. LG&E and KU are also allocated costs of defined benefit plans from LKS for defined benefit plans sponsored by LKE. See Note 15 for additional information on costs allocated to LG&E and KU from LKS. (b)As a result of the 2014 Kentucky rate case settlement that became effective July 1, 2015, the difference between net periodic defined benefit costs calculated in accordance with LKE's, LG&E's and KU's pension accounting policy and the net periodic defined benefit costs calculated using a 15 year amortization period for gains and losses is recorded as a regulatory asset. Of the costs charged to Other operation and maintenance, Other Income (Expense) - net or regulatory assets, excluding amounts charged to construction and other non-expense accounts, $3 million for LG&E and $1 million for KU were recorded as regulatory assets in 2020, $2 million for LG&E and $1 million for KU were recorded as regulatory assets in 2019 and $3 million for LG&E and $2 million for KU were recorded as regulatory assets in 2018. In the table above, LG&E amounts include costs for the specific plans it sponsors and the following allocated costs of defined benefit plans sponsored by LKE. LG&E is also allocated costs of defined benefit plans from LKS for defined benefit plans sponsored by LKE. See Note 15 for additional information on costs allocated to LG&E from LKS. These allocations are based on LG&E's participation in those plans, which management believes are reasonable:
| Pension Benefits |  | Other Postretirement Benefits
| 2019 (a) |  | 2018 |  | 2019 (a) |  | 2018
LG&E Non-Union Only | $ | — |  |  | $ | 2 |  |  | $ | 2 |  |  | $ | 2 |
(a)The pension plans sponsored by LKE and LG&E were merged effective January 1, 2020 into the LG&E and KU Pension Plan, sponsored by LKE. (PPL, LKE and LG&E) PPL, LKE, and LG&E use base mortality tables issued by the Society of Actuaries for all U.S. defined benefit pension and other postretirement benefit plans. In 2019, PPL, LKE and LGE used RP-2014 base tables with collar and factor adjustments, where applicable, and the MP-2017 mortality improvement scale from 2006 on a generational basis. In 2020, PPL and LKE updated to the Pri-2012 base table and the MP-2020 projection scale with varying adjustment factors based on the underlying demographic and geographic differences and experience of the plan participants. The following weighted-average assumptions were used in the valuation of the benefit obligations at December 31. The U.K. pension benefits apply to PPL only.
| Pension Benefits |  |  |  |
| U.S. |  | U.K. |  | Other Postretirement Benefits
| 2020 |  | 2019 |  | 2020 |  | 2019 |  | 2020 |  | 2019
PPL |  |  |  |  |  |  |  |  |  |  |
Discount rate | 2.92 | % |  | 3.64 | % |  | 1.53 | % |  | 1.94 | % |  | 2.84 | % |  | 3.60 | %
Rate of compensation increase | 3.76 | % |  | 3.79 | % |  | 3.25 | % |  | 3.25 | % |  | 3.75 | % |  | 3.76 | %
LKE |  |  |  |  |  |  |  |  |  |  |
Discount rate | 2.91 | % |  | 3.62 | % |  |  |  |  |  | 2.85 | % |  | 3.59 | %
Rate of compensation increase | 3.50 | % |  | 3.50 | % |  |  |  |  |  | 3.50 | % |  | 3.50 | %
LG&E |  |  |  |  |  |  |  |  |  |  |
Discount rate | — | % |  | 3.60 | % |  |  |  |  |  |  |  |
The following weighted-average assumptions were used to determine the net periodic defined benefit costs for the years ended December 31. The U.K. pension benefits apply to PPL only.
| Pension Benefits |  |  |  |  |  |
| U.S. |  | U.K. |  | Other Postretirement Benefits
| 2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018
PPL |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discount rate service cost | 3.64 | % |  | 4.35 | % |  | 3.70 | % |  | 2.03 | % |  | 3.12 | % |  | 2.73 | % |  | 3.60 | % |  | 4.31 | % |  | 3.64 | %
Discount rate interest cost | 3.64 | % |  | 4.35 | % |  | 3.70 | % |  | 1.73 | % |  | 2.62 | % |  | 2.31 | % |  | 3.60 | % |  | 4.31 | % |  | 3.64 | %
Rate of compensation increase | 3.79 | % |  | 3.79 | % |  | 3.78 | % |  | 3.25 | % |  | 3.50 | % |  | 3.50 | % |  | 3.76 | % |  | 3.76 | % |  | 3.75 | %
Expected return on plan assets | 7.25 | % |  | 7.25 | % |  | 7.25 | % |  | 7.13 | % |  | 7.21 | % |  | 7.23 | % |  | 6.44 | % |  | 6.46 | % |  | 6.40 | %
LKE |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discount rate | 3.62 | % |  | 4.35 | % |  | 3.69 | % |  |  |  |  |  |  |  | 3.59 | % |  | 4.32 | % |  | 3.65 | %
Rate of compensation increase | 3.50 | % |  | 3.50 | % |  | 3.50 | % |  |  |  |  |  |  |  | 3.50 | % |  | 3.50 | % |  | 3.50 | %
Expected return on plan assets (a) | 7.25 | % |  | 7.25 | % |  | 7.25 | % |  |  |  |  |  |  |  | 7.02 | % |  | 7.00 | % |  | 7.15 | %
LG&E |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discount rate | — | % |  | 4.33 | % |  | 3.65 | % |  |  |  |  |  |  |  |  |  |  |  |
Expected return on plan assets (a) | — | % |  | 7.25 | % |  | 7.25 | % |  |  |  |  |  |  |  |  |  |  |  |
(a)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. (PPL and LKE) The following table provides the assumed health care cost trend rates for the years ended December 31:
| 2020 |  | 2019 |  | 2018
PPL and LKE |  |  |  |  |
Health care cost trend rate assumed for next year |  |  |  |  |
– obligations | 6.5 | % |  | 6.6 | % |  | 6.6 | %
– cost | 6.6 | % |  | 6.6 | % |  | 6.6 | %
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate) |  |  |  |  |
– obligations | 5.0 | % |  | 5.0 | % |  | 5.0 | %
– cost | 5.0 | % |  | 5.0 | % |  | 5.0 | %
Year that the rate reaches the ultimate trend rate |  |  |  |  |
– obligations | 2027 |  | 2024 |  | 2023
– cost | 2024 |  | 2023 |  | 2022
(PPL) The funded status of PPL's plans at December 31 was as follows:
| Pension Benefits |  |  |  |
| U.S. |  | U.K. |  | Other Postretirement Benefits
| 2020 |  | 2019 |  | 2020 |  | 2019 |  | 2020 |  | 2019
Change in Benefit Obligation |  |  |  |  |  |  |  |  |  |  |
Benefit Obligation, beginning of period | $ | 4,146 |  |  | $ | 3,883 |  |  | $ | 8,515 |  |  | $ | 7,275 |  |  | $ | 557 |  |  | $ | 538 |
Service cost | 56 |  |  | 50 |  |  | 89 |  |  | 68 |  |  | 6 |  |  | 6 |
Interest cost | 146 |  |  | 164 |  |  | 143 |  |  | 187 |  |  | 19 |  |  | 22 |
Participant contributions | — |  |  | — |  |  | 12 |  |  | 12 |  |  | 15 |  |  | 14 |
Plan amendments | 2 |  |  | 2 |  |  | — |  |  | — |  |  | 5 |  |  | — |
Actuarial (gain) loss | 256 |  |  | 368 |  |  | 624 |  |  | 1,220 |  |  | 29 |  |  | 34 |
Settlements | (114) |  |  | (21) |  |  | — |  |  | — |  |  | — |  |  | — |
Gross benefits paid | (241) |  |  | (300) |  |  | (366) |  |  | (363) |  |  | (58) |  |  | (58) |
Federal subsidy | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 1 |
Currency conversion | — |  |  | — |  |  | 281 |  |  | 116 |  |  | — |  |  | — |
Benefit Obligation, end of period | 4,251 |  |  | 4,146 |  |  | 9,298 |  |  | 8,515 |  |  | 573 |  |  | 557 |
Change in Plan Assets |  |  |  |  |  |  |  |  |  |  |
Plan assets at fair value, beginning of period | 3,585 |  |  | 3,109 |  |  | 8,945 |  |  | 7,801 |  |  | 340 |  |  | 301 |
Actual return on plan assets | 723 |  |  | 735 |  |  | 805 |  |  | 1,095 |  |  | 56 |  |  | 71 |
Employer contributions | 115 |  |  | 63 |  |  | 272 |  |  | 278 |  |  | 18 |  |  | 10 |
Participant contributions | — |  |  | — |  |  | 12 |  |  | 12 |  |  | 11 |  |  | 10 |
Settlements | (114) |  |  | (22) |  |  | — |  |  | — |  |  | — |  |  | — |
Gross benefits paid | (241) |  |  | (300) |  |  | (366) |  |  | (363) |  |  | (58) |  |  | (52) |
Currency conversion | — |  |  | — |  |  | 302 |  |  | 122 |  |  | — |  |  | — |
Plan assets at fair value, end of period | 4,068 |  |  | 3,585 |  |  | 9,970 |  |  | 8,945 |  |  | 367 |  |  | 340 |
Funded Status, end of period | $ | (183) |  |  | $ | (561) |  |  | $ | 672 |  |  | $ | 430 |  |  | $ | (206) |  |  | $ | (217) |
Amounts recognized in the Balance Sheets consist of: |  |  |  |  |  |  |  |  |  |  |
Noncurrent asset | $ | 24 |  |  | $ | 24 |  |  | $ | 682 |  |  | $ | 440 |  |  | $ | — |  |  | $ | 11 |
Current liability | (18) |  |  | (8) |  |  | — |  |  | (1) |  |  | (22) |  |  | (2) |
Noncurrent liability | (189) |  |  | (577) |  |  | (10) |  |  | (9) |  |  | (184) |  |  | (226) |
Net amount recognized, end of period | $ | (183) |  |  | $ | (561) |  |  | $ | 672 |  |  | $ | 430 |  |  | $ | (206) |  |  | $ | (217) |
| Pension Benefits |  |  |  |
| U.S. |  | U.K. |  | Other Postretirement Benefits
| 2020 |  | 2019 |  | 2020 |  | 2019 |  | 2020 |  | 2019
Amounts recognized in AOCI and regulatory assets/liabilities (pre-tax) consist of: |  |  |  |  |  |  |  |  |  |  |
Prior service cost (credit) | $ | 27 |  |  | $ | 34 |  |  | $ | 11 |  |  | $ | 11 |  |  | $ | 14 |  |  | $ | 10 |
Net actuarial (gain) loss | 695 |  |  | 1,029 |  |  | 3,682 |  |  | 3,435 |  |  | — |  |  | 6 |
Total (a) | $ | 722 |  |  | $ | 1,063 |  |  | $ | 3,693 |  |  | $ | 3,446 |  |  | $ | 14 |  |  | $ | 16 |
Total accumulated benefit obligation for defined benefit pension plans | $ | 4,024 |  |  | $ | 3,910 |  |  | $ | 8,516 |  |  | $ | 7,821 |  |  |  |  |
(a)WPD is not subject to accounting for the effects of certain types of regulation as prescribed by GAAP and as a result, does not record regulatory assets/liabilities. For PPL's U.S. pension and other postretirement benefit plans, the amounts recognized in AOCI and regulatory assets/liabilities at December 31 were as follows:
| U.S. Pension Benefits |  | Other Postretirement Benefits
| 2020 |  | 2019 |  | 2020 |  | 2019
AOCI | $ | 270 |  |  | $ | 352 |  |  | $ | 10 |  |  | $ | 13 |
Regulatory assets/liabilities | 452 |  |  | 711 |  |  | 4 |  |  | 3 |
Total | $ | 722 |  |  | $ | 1,063 |  |  | $ | 14 |  |  | $ | 16 |
The actuarial loss for U.S. pension plans in 2020 was related to a change in the discount rate used to measure the benefit obligations of those plans offset by gains resulting from the updated mortality assumptions noted above and other demographic assumption changes resulting from the completion of a tri-annual demographic experience study. The actuarial loss for U.S. pension plans in 2019 was primarily related to a change in the discount rate used to measure the benefit obligations of those plans. The actuarial loss for U.K. pension plans in 2020 and 2019 was primarily related to a change in the discount rate used to measure the benefit obligations of those plans. The following tables provide information on pension plans where the projected benefit obligation (PBO) or accumulated benefit obligation (ABO) exceed the fair value of plan assets:
| U.S. |  | U.K.
| PBO in excess of plan assets |  | PBO in excess of plan assets
| 2020 |  | 2019 |  | 2020 |  | 2019
Projected benefit obligation | $ | 1,875 |  |  | $ | 3,861 |  |  | $ | 11 |  |  | $ | 10 |
Fair value of plan assets | 1,668 |  |  | 3,275 |  |  | — |  |  | — |
| U.S. |  | U.K.
| ABO in excess of plan assets |  | ABO in excess of plan assets
| 2020 |  | 2019 |  | 2020 |  | 2019
Accumulated benefit obligation | $ | 184 |  |  | $ | 3,624 |  |  | $ | 11 |  |  | $ | 10 |
Fair value of plan assets | — |  |  | 3,275 |  |  | — |  |  | — |
(LKE) The funded status of LKE's plans at December 31 was as follows:
| Pension Benefits |  | Other Postretirement Benefits
| 2020 |  | 2019 |  | 2020 |  | 2019
Change in Benefit Obligation |  |  |  |  |  |  |
Benefit Obligation, beginning of period | $ | 1,684 |  |  | $ | 1,580 |  |  | $ | 208 |  |  | $ | 205 |
Service cost | 24 |  |  | 22 |  |  | 4 |  |  | 4 |
Interest cost | 57 |  |  | 66 |  |  | 7 |  |  | 8 |
Participant contributions | — |  |  | — |  |  | 9 |  |  | 7 |
Plan amendments | 2 |  |  | 2 |  |  | 5 |  |  | — |
Actuarial (gain) loss (a) | 164 |  |  | 166 |  |  | 18 |  |  | 5 |
Settlements | (83) |  |  | (16) |  |  | — |  |  | — |
Gross benefits paid | (63) |  |  | (136) |  |  | (22) |  |  | (21) |
Benefit Obligation, end of period | 1,785 |  |  | 1,684 |  |  | 229 |  |  | 208 |
Change in Plan Assets |  |  |  |  |  |  |
Plan assets at fair value, beginning of period | 1,470 |  |  | 1,294 |  |  | 141 |  |  | 117 |
Actual return on plan assets | 294 |  |  | 304 |  |  | 28 |  |  | 27 |
Employer contributions | 50 |  |  | 24 |  |  | 4 |  |  | 11 |
Participant contributions | — |  |  | — |  |  | 9 |  |  | 7 |
Settlements | (83) |  |  | (16) |  |  | — |  |  | — |
Gross benefits paid | (63) |  |  | (136) |  |  | (22) |  |  | (21) |
Plan assets at fair value, end of period | 1,668 |  |  | 1,470 |  |  | 160 |  |  | 141 |
Funded Status, end of period | $ | (117) |  |  | $ | (214) |  |  | $ | (69) |  |  | $ | (67) |
Amounts recognized in the Balance Sheets consist of: |  |  |  |  |  |  |
Noncurrent asset | $ | — |  |  | $ | 24 |  |  | $ | — |  |  | $ | 11 |
Current liability | (5) |  |  | (5) |  |  | (2) |  |  | (2) |
Noncurrent liability | (112) |  |  | (233) |  |  | (67) |  |  | (76) |
Net amount recognized, end of period | $ | (117) |  |  | $ | (214) |  |  | $ | (69) |  |  | $ | (67) |
Amounts recognized in AOCI and regulatory assets/liabilities (pre-tax) consist of: |  |  |  |  |  |  |
Prior service cost | $ | 23 |  |  | $ | 30 |  |  | $ | 14 |  |  | $ | 10 |
Net actuarial (gain) loss | 296 |  |  | 380 |  |  | (37) |  |  | (37) |
Total | $ | 319 |  |  | $ | 410 |  |  | $ | (23) |  |  | $ | (27) |
Total accumulated benefit obligation for defined benefit pension plans | $ | 1,657 |  |  | $ | 1,561 |  |  |  |  |
(a)The actuarial (gain) loss for all pension plans in 2020 and 2019 was primarily related to changes in the discount rate used to measure the benefit obligations of those plans. The amounts recognized in AOCI and regulatory assets/liabilities at December 31 were as follows:
| Pension Benefits |  | Other Postretirement Benefits
| 2020 |  | 2019 |  | 2020 |  | 2019
AOCI | $ | 127 |  |  | $ | 132 |  |  | $ | 2 |  |  | $ | 4 |
Regulatory assets/liabilities | 192 |  |  | 278 |  |  | (25) |  |  | (31) |
Total | $ | 319 |  |  | $ | 410 |  |  | $ | (23) |  |  | $ | (27) |
The following tables provide information on pension plans where the projected benefit obligation (PBO) or accumulated benefit obligations (ABO) exceed the fair value of plan assets:
| PBO in excess of plan assets
| 2020 |  | 2019
Projected benefit obligation | $ | 1,785 |  |  | $ | 1,398 |
Fair value of plan assets | 1,668 |  |  | 1,160 |
| ABO in excess of plan assets
| 2020 |  | 2019
Accumulated benefit obligation | $ | 104 |  |  | $ | 1,276 |
Fair value of plan assets | — |  |  | 1,160 |
(LG&E) The funded status of LG&E's plan at December 31, was as follows:
| Pension Benefits
| 2019 (a)
Change in Benefit Obligation |
Benefit Obligation, beginning of period | $ | 285 |
Service cost | 1 |
Interest cost | 11 |
Actuarial (gain) loss | 25 |
Gross benefits paid | (36) |
Benefit Obligation, end of period | 286 |
Change in Plan Assets |
Plan assets at fair value, beginning of period | 281 |
Actual return on plan assets | 64 |
Employer contributions | 1 |
Gross benefits paid | (36) |
Plan assets at fair value, end of period | 310 |
Funded Status, end of period | $ | 24 |
Amounts recognized in the Balance Sheets consist of: |
Noncurrent asset (liability) | $ | 24 |
Net amount recognized, end of period | $ | 24 |
Amounts recognized in regulatory assets (pre-tax) consist of: |
Prior service cost | $ | 17 |
Net actuarial loss | 79 |
Total | $ | 96 |
Total accumulated benefit obligation for defined benefit pension plan | $ | 286 |
(a)The pension plans sponsored by LKE and LG&E were merged effective January 1, 2020 into the LG&E and KU Pension Plan, sponsored by LKE. LG&E's pension plan had plan assets in excess of projected and accumulated benefit obligations December 31, 2019. In addition to the plan it sponsored, LG&E is allocated a portion of the funded status and costs of certain defined benefit plans sponsored by LKE. LG&E is also allocated costs of defined benefit plans from LKS for defined benefit plans sponsored by LKE. See Note 15 for additional information on costs allocated to LG&E from LKS. These allocations are based on LG&E's participation in those plans, which management believes are reasonable. The actuarially determined obligations of current active employees and retired employees are used as a basis to allocate total plan activity, including active and retiree costs and obligations. Allocations to LG&E resulted in (assets)/liabilities at December 31 as follows:
| 2020 |  | 2019
Pension | $ | (78) |  |  | $ | (7) |
Other postretirement benefits | 68 |  |  | 63 |
(PPL Electric) Although PPL Electric does not directly sponsor any defined benefit plans, it is allocated a portion of the funded status and costs of plans sponsored by PPL Services based on its participation in those plans, which management believes are reasonable. The actuarially determined obligations of current active employees and retirees are used as a basis to allocate total plan activity, including active and retiree costs and obligations. Allocations to PPL Electric resulted in (assets)/liabilities at December 31 as follows:
| 2020 |  | 2019
Pension | $ | (4) |  |  | $ | 179 |
Other postretirement benefits | 99 |  |  | 122 |
(KU) Although KU does not directly sponsor any defined benefit plans, it is allocated a portion of the funded status and costs of plans sponsored by LKE. KU is also allocated costs of defined benefit plans from LKS for defined benefit plans sponsored by LKE. See Note 15 for additional information on costs allocated to KU from LKS. These allocations are based on KU's participation in those plans, which management believes are reasonable. The actuarially determined obligations of current active employees and retired employees of KU are used as a basis to allocate total plan activity, including active and retiree costs and obligations. Allocations to KU resulted in (assets)/liabilities at December 31 as follows.
| 2020 |  | 2019
Pension | $ | (62) |  |  | $ | (31) |
Other postretirement benefits | 16 |  |  | 16 |
Plan Assets - U.S. Pension Plans (PPL, LKE and LG&E) PPL's primary legacy pension plan and the pension plan sponsored by LKE are invested in the PPL Services Corporation Master Trust (the Master Trust) that also includes 401(h) accounts that are restricted for certain other postretirement benefit obligations of PPL and LKE. The investment strategy for the Master Trust is to achieve a risk-adjusted return on a mix of assets that, in combination with PPL's funding policy, will ensure that sufficient assets are available to provide long-term growth and liquidity for benefit payments, while also managing the duration of the assets to complement the duration of the liabilities. The Master Trust benefits from a wide diversification of asset types, investment fund strategies and external investment fund managers, and therefore has no significant concentration of risk. The investment policy of the Master Trust outlines investment objectives and defines the responsibilities of the EBPB, external investment managers, investment advisor and trustee and custodian. The investment policy is reviewed annually by PPL's Board of Directors. The EBPB created a risk management framework around the trust assets and pension liabilities. This framework considers the trust assets as being composed of three sub-portfolios: growth, immunizing and liquidity portfolios. The growth portfolio is comprised of investments that generate a return at a reasonable risk, including equity securities, certain debt securities and alternative investments. The immunizing portfolio consists of debt securities, generally with long durations, and derivative positions. The immunizing portfolio is designed to offset a portion of the change in the pension liabilities due to changes in interest rates. The liquidity portfolio consists primarily of cash and cash equivalents. Target allocation ranges have been developed for each portfolio based on input from external consultants with a goal of limiting funded status volatility. The EBPB monitors the investments in each portfolio, and seeks to obtain a target portfolio that emphasizes reduction of risk of loss from market volatility. In pursuing that goal, the EBPB establishes revised guidelines from time to time. EBPB investment guidelines as of the end of 2020 are presented below. The asset allocation for the trust and the target allocation by portfolio at December 31 are as follows:
| Percentage of trust assets |  | 2020
| 2020 |  | 2019 (a) |  | Target Asset Allocation (a)
Growth Portfolio | 56 | % |  | 57 | % |  | 55 | %
Equity securities | 34 | % |  | 34 | % |  |
Debt securities (b) | 13 | % |  | 14 | % |  |
Alternative investments | 9 | % |  | 9 | % |  |
Immunizing Portfolio | 43 | % |  | 42 | % |  | 43 | %
Debt securities (b) | 33 | % |  | 35 | % |  |
Derivatives | 10 | % |  | 7 | % |  |
Liquidity Portfolio | 1 | % |  | 1 | % |  | 2 | %
Total | 100 | % |  | 100 | % |  | 100 | %
(a)Allocations exclude consideration of a group annuity contract held by the LG&E and KU Retirement Plan. (b)Includes commingled debt funds, which PPL treats as debt securities for asset allocation purposes. (LKE) LKE has pension plans whose assets are invested solely in the Master Trust, which is fully disclosed below. The fair value of these plans' assets of $1.7 billion and $1.5 billion at December 31, 2020 and 2019 represents an interest of approximately 41% in the Master Trust. (LG&E) LG&E had a pension plan whose assets were invested solely in the Master Trust, which is fully disclosed below. The fair value of this plan's assets of $310 million at December 31, 2019 represented an interest of approximately 9% in the Master Trust. The pension plans sponsored by LKE and LG&E were merged effective January 1, 2020 into the LG&E and KU Pension Plan, sponsored by LKE. The fair value of LKE's plan assets allocated to LG&E was $618 million and $251 million at December 31, 2020 and 2019. (KU) The fair value of LKE's plan assets allocated to KU was $505 million and $445 million at December 31, 2020 and 2019. (PPL, LKE and LG&E) The fair value of net assets in the Master Trust by asset class and level within the fair value hierarchy was:
| December 31, 2020 |  | December 31, 2019
|  |  | Fair Value Measurements Using |  |  |  | Fair Value Measurements Using
| Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3
PPL Services Corporation Master Trust |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | 300 |  |  | $ | 300 |  |  | $ | — |  |  | $ | — |  |  | $ | 182 |  |  | $ | 182 |  |  | $ | — |  |  | $ | — |
Equity securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Equity | 60 |  |  | 60 |  |  | — |  |  | — |  |  | 194 |  |  | 194 |  |  | — |  |  | — |
U.S. Equity fund measured at NAV (a) | 742 |  |  | — |  |  | — |  |  | — |  |  | 451 |  |  | — |  |  | — |  |  | — |
International equity fund at NAV (a) | 566 |  |  | — |  |  | — |  |  | — |  |  | 554 |  |  | — |  |  | — |  |  | — |
Commingled debt measured at NAV (a) | 712 |  |  | — |  |  | — |  |  | — |  |  | 621 |  |  | — |  |  | — |  |  | — |
Debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury and U.S. government sponsored agency | 336 |  |  | 335 |  |  | 1 |  |  | — |  |  | 310 |  |  | 309 |  |  | 1 |  |  | — |
Corporate | 1,045 |  |  | — |  |  | 1,030 |  |  | 15 |  |  | 951 |  |  | — |  |  | 931 |  |  | 20 |
Other | 13 |  |  | — |  |  | 13 |  |  | — |  |  | 14 |  |  | — |  |  | 14 |  |  | — |
| December 31, 2020 |  | December 31, 2019
|  |  | Fair Value Measurements Using |  |  |  | Fair Value Measurements Using
| Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3
Alternative investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate measured at NAV (a) | 76 |  |  | — |  |  | — |  |  | — |  |  | 88 |  |  | — |  |  | — |  |  | — |
Private equity measured at NAV (a) | 68 |  |  | — |  |  | — |  |  | — |  |  | 62 |  |  | — |  |  | — |  |  | — |
Hedge funds measured at NAV (a) | 223 |  |  | — |  |  | — |  |  | — |  |  | 194 |  |  | — |  |  | — |  |  | — |
Limited Partnerships at NAV (a) | 6 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Derivatives | (37) |  |  | — |  |  | (37) |  |  | — |  |  | 3 |  |  | — |  |  | 3 |  |  | — |
Insurance contracts | — |  |  | — |  |  | — |  |  | — |  |  | 4 |  |  | — |  |  | — |  |  | 4 |
PPL Services Corporation Master Trust assets, at fair value | 4,110 |  |  | $ | 695 |  |  | $ | 1,007 |  |  | $ | 15 |  |  | 3,628 |  |  | $ | 685 |  |  | $ | 949 |  |  | $ | 24 |
Receivables and payables, net (b) | 116 |  |  |  |  |  |  |  |  | 99 |  |  |  |  |  |  |
401(h) accounts restricted for other postretirement benefit obligations | (158) |  |  |  |  |  |  |  |  | (142) |  |  |  |  |  |  |
Total PPL Services Corporation Master Trust pension assets | $ | 4,068 |  |  |  |  |  |  |  |  | $ | 3,585 |  |  |  |  |  |  |
(a)In accordance with accounting guidance certain investments that are measured at fair value using the net asset value per share (NAV), or its equivalent, practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in the table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the statement of financial position. (b)Receivables and payables, net represents amounts for investments sold/purchased but not yet settled along with interest and dividends earned but not yet received. A reconciliation of the Master Trust assets classified as Level 3 at December 31, 2020 is as follows:
| Corporate debt |  | Insurance contracts |  |  |  | Total
Balance at beginning of period | $ | 20 |  |  | $ | 4 |  |  |  |  | $ | 24 |
Purchases, sales and settlements | (5) |  |  | (4) |  |  |  |  | (9) |
Balance at end of period | $ | 15 |  |  | $ | — |  |  |  |  | $ | 15 |
A reconciliation of the Master Trust assets classified as Level 3 at December 31, 2019 is as follows:
| Corporate debt |  | Insurance contracts |  |  |  | Total
Balance at beginning of period | $ | 25 |  |  | $ | 21 |  |  |  |  | $ | 46 |
Actual return on plan assets: |  |  |  |  |  |  |
Relating to assets still held at the reporting date | (1) |  |  | 4 |  |  |  |  | 3 |
Relating to assets sold during the period | 3 |  |  | — |  |  |  |  | 3 |
Purchases, sales and settlements | (7) |  |  | (21) |  |  |  |  | (28) |
Balance at end of period | $ | 20 |  |  | $ | 4 |  |  |  |  | $ | 24 |
The fair value measurements of cash and cash equivalents are based on the amounts on deposit. The market approach is used to measure fair value of equity securities. The fair value measurements of equity securities (excluding commingled funds), which are generally classified as Level 1, are based on quoted prices in active markets. These securities represent actively and passively managed investments that are managed against various equity indices. Investments in commingled equity and debt funds are categorized as equity securities. Investments in commingled equity funds include funds that invest in U.S. and international equity securities. Investments in commingled debt funds include funds that invest in a diversified portfolio of emerging market debt obligations, as well as funds that invest in investment grade long-duration fixed-income securities. The fair value measurements of debt securities are generally based on evaluations that reflect observable market information, such as actual trade information for identical securities or for similar securities, adjusted for observable differences. The fair value of debt securities is generally measured using a market approach, including the use of pricing models, which incorporate observable inputs. Common inputs include benchmark yields, relevant trade data, broker/dealer bid/ask prices, benchmark securities and credit valuation adjustments. When necessary, the fair value of debt securities is measured using the income approach, which incorporates similar observable inputs as well as payment data, future predicted cash flows, collateral performance and new issue data. For the Master Trust, these securities represent investments in securities issued by U.S. Treasury and U.S. government sponsored agencies; investments securitized by residential mortgages, auto loans, credit cards and other pooled loans; investments in investment grade and non-investment grade bonds issued by U.S. companies across several industries; investments in debt securities issued by foreign governments and corporations. Investments in real estate represent an investment in a partnership whose purpose is to manage investments in core U.S. real estate properties diversified geographically and across major property types (e.g., office, industrial, retail, etc.). The strategy is focused on properties with high occupancy rates with quality tenants. This results in a focus on high income and stable cash flows with appreciation being a secondary factor. Core real estate generally has a lower degree of leverage when compared with more speculative real estate investing strategies. The partnership has limitations on the amounts that may be redeemed based on available cash to fund redemptions. Additionally, the general partner may decline to accept redemptions when necessary to avoid adverse consequences for the partnership, including legal and tax implications, among others. The fair value of the investment is based upon a partnership unit value. Investments in private equity represent interests in partnerships in multiple early-stage venture capital funds and private equity fund of funds that use a number of diverse investment strategies. The partnerships have limited lives of at least 10 years, after which liquidating distributions will be received. Prior to the end of each partnership's life, the investment cannot be redeemed with the partnership; however, the interest may be sold to other parties, subject to the general partner's approval. At December 31, 2020, the Master Trust has unfunded commitments of $45 million that may be required during the lives of the partnerships. Fair value is based on an ownership interest in partners' capital to which a proportionate share of net assets is attributed. Investments in limited partnerships include Term Asset-Backed Securities Loan Facility (TALF) funds. The Master Trust received notice that the TALF funds are liquidating in an orderly manner and distributing capital back to the partners. Therefore, the Master Trust has no unfunded commitment related to the TALF funds. Fair value of the funds is based on an ownership interest in partners' capital to which a proportionate share of net assets is attributed. Investments in hedge funds represent investments in a fund of hedge funds. Hedge funds seek a return utilizing a number of diverse investment strategies. The strategies, when combined aim to reduce volatility and risk while attempting to deliver positive returns under most market conditions. Major investment strategies for the fund of hedge funds include long/short equity, tactical trading, event driven, and relative value. Shares may be redeemed with 45 days prior written notice. The fund is subject to short term lockups and other restrictions. The fair value for the fund has been estimated using the net asset value per share. The fair value measurements of derivative instruments utilize various inputs that include quoted prices for similar contracts or market-corroborated inputs. In certain instances, these instruments may be valued using models, including standard option valuation models and standard industry models. These securities primarily represent investments in treasury futures, total return swaps, interest rate swaps and swaptions (the option to enter into an interest rate swap), which are valued based on quoted prices, changes in the value of the underlying exposure or on the swap details, such as swap curves, notional amount, index and term of index, reset frequency, volatility and payer/receiver credit ratings. In 2019, obligations underlying an investment in an immediate participation guaranteed group annuity contract, classified as Level 3, were assumed by the insurance company, with a residual amount remaining in the general account of the insurer that was paid into the master trust or distributed to participants in 2020. Plan Assets - U.S. Other Postretirement Benefit Plans The investment strategy with respect to other postretirement benefit obligations is to fund VEBA trusts and/or 401(h) accounts with voluntary contributions and to invest in a tax efficient manner. Excluding the 401(h) accounts included in the Master Trust, other postretirement benefit plans are invested in a mix of assets for long-term growth with an objective of earning returns that provide liquidity as required for benefit payments. These plans benefit from diversification of asset types, investment fund strategies and investment fund managers and, therefore, have no significant concentration of risk. Equity securities include investments in domestic large-cap commingled funds. Ownership interests in commingled funds that invest entirely in debt securities are classified as equity securities, but treated as debt securities for asset allocation and target allocation purposes. Ownership interests in money market funds are treated as cash and cash equivalents for asset allocation and target allocation purposes. The asset allocation for the PPL VEBA trusts, excluding LKE, and the target allocation, by asset class, at December 31 are detailed below.
| Percentage of plan assets |  | Target Asset Allocation
| 2020 |  | 2019 |  | 2020
Asset Class |  |  |  |  |
U.S. Equity securities | 42 | % |  | 45 | % |  | 45 | %
Debt securities (a) | 55 | % |  | 52 | % |  | 50 | %
Cash and cash equivalents (b) | 3 | % |  | 3 | % |  | 5 | %
Total | 100 | % |  | 100 | % |  | 100 | %
(a)Includes commingled debt funds and debt securities. (b)Includes money market funds. LKE's other postretirement benefit plan is invested primarily in a 401(h) account, as disclosed in the PPL Services Corporation Master Trust, with insignificant amounts invested in money market funds within VEBA trusts for liquidity. The fair value of assets in the U.S. other postretirement benefit plans by asset class and level within the fair value hierarchy was:
| December 31, 2020 |  | December 31, 2019
|  |  | Fair Value Measurement Using |  |  |  | Fair Value Measurement Using
| Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3
Money market funds | $ | 5 |  |  | $ | 5 |  |  | $ | — |  |  | $ | — |  |  | $ | 6 |  |  | $ | 6 |  |  | $ | — |  |  | $ | — |
U.S. Equity securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Large-cap equity fund measure at NAV (a) | 89 |  |  | — |  |  | — |  |  | — |  |  | 89 |  |  | — |  |  | — |  |  | — |
Commingled debt fund measured at NAV (a) | 77 |  |  | — |  |  | — |  |  | — |  |  | 68 |  |  | — |  |  | — |  |  | — |
Debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds | 37 |  |  | — |  |  | 37 |  |  | — |  |  | 35 |  |  | — |  |  | 35 |  |  | — |
U.S. Treasury and U.S. government sponsored agency | 2 |  |  | — |  |  | 2 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total VEBA trust assets, at fair value | 210 |  |  | $ | 5 |  |  | $ | 39 |  |  | $ | — |  |  | 198 |  |  | $ | 6 |  |  | $ | 35 |  |  | $ | — |
Receivables and payables, net (b) | (1) |  |  |  |  |  |  |  |  | — |  |  |  |  |  |  |
401(h) account assets | 158 |  |  |  |  |  |  |  |  | 142 |  |  |  |  |  |  |
Total other postretirement benefit plan assets | $ | 367 |  |  |  |  |  |  |  |  | $ | 340 |  |  |  |  |  |  |
(a)In accordance with accounting guidance certain investments that are measured at fair value using the net asset value per share (NAV), or its equivalent, practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in the table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the statement of financial position. (b)Receivables and payables represent amounts for investments sold/purchased but not yet settled along with interest and dividends earned but not yet received. Investments in money market funds represent investments in funds that invest primarily in a diversified portfolio of investment grade money market instruments, including, but not limited to, commercial paper, notes, repurchase agreements and other evidences of indebtedness with a maturity not exceeding 13 months from the date of purchase. The primary objective of the fund is a level of current income consistent with stability of principal and liquidity. Redemptions can be made daily on this fund. Investments in large-cap equity securities represent investments in a passively managed equity index fund that invests in securities and a combination of other collective funds. Fair value measurements are not obtained from a quoted price in an active market but are based on firm quotes of net asset values per share as provided by the trustee of the fund. Redemptions can be made daily on this fund. Investments in commingled debt securities represent investments in a fund that invests in a diversified portfolio of investment grade long-duration fixed income securities. Redemptions can be made daily on these funds. Investments in corporate bonds represent investment in a diversified portfolio of investment grade long-duration fixed income securities. The fair value of debt securities are generally based on evaluations that reflect observable market information, such as actual trade information for identical securities or for similar securities, adjusted for observable differences. Investments in U.S. Treasury and U.S. government sponsored agencies represent securities included in a portfolio of investment-grade long-duration fixed income. The fair value of debt securities are generally based on evaluations that reflect observable market information, such as actual trade information for identical securities or for similar securities, adjusted for observable differences. Plan Assets - U.K. Pension Plans (PPL) The overall investment strategy of WPD's pension plans is developed by each plan's independent trustees in its Statement of Investment Principles in compliance with the U.K. Pensions Act of 1995 and other U.K. legislation. The trustees' primary focus is to ensure that assets are sufficient to meet members' benefits as they fall due with a longer term objective to reduce investment risk. The investment strategy is intended to maximize investment returns while not incurring excessive volatility in the funding position. WPD's plans are invested in a wide diversification of asset types, fund strategies and fund managers; and therefore, have no significant concentration of risk. Commingled funds that consist entirely of debt securities are traded as equity units, but treated by WPD as debt securities for asset allocation and target allocation purposes. These include investments in U.K. corporate bonds and U.K. gilts. The asset allocation and target allocation at December 31 of WPD's pension plans are detailed below.
|  |  |  |  | Target Asset
| Percentage of plan assets |  | Allocation
| 2020 |  | 2019 |  | 2020
Asset Class |  |  |  |  |
Cash and cash equivalents | 4 | % |  | 2 | % |  | — | %
Equity securities |  |  |  |  |
U.K. | — | % |  | — | % |  | 2 | %
European (excluding the U.K.) | — | % |  | — | % |  | 1 | %
Asian-Pacific | — | % |  | — | % |  | 1 | %
North American | — | % |  | 1 | % |  | 1 | %
Emerging markets | — | % |  | — | % |  | 1 | %
Global equities | 23 | % |  | 19 | % |  | 9 | %
Global Tactical Asset Allocation | 20 | % |  | 29 | % |  | 41 | %
Debt securities (a) | 48 | % |  | 43 | % |  | 38 | %
Alternative investments | 5 | % |  | 6 | % |  | 6 | %
Total | 100 | % |  | 100 | % |  | 100 | %
(a)Includes commingled debt funds. The fair value of assets in the U.K. pension plans by asset class and level within the fair value hierarchy was:
| December 31, 2020 |  | December 31, 2019
|  |  | Fair Value Measurement Using |  |  |  | Fair Value Measurement Using
| Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3
Cash and cash equivalents | $ | 412 |  |  | $ | 412 |  |  | $ | — |  |  | $ | — |  |  | $ | 154 |  |  | $ | 154 |  |  | $ | — |  |  | $ | — |
Equity securities measured at NAV (a) : |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.K. companies | 1 |  |  | — |  |  | — |  |  | — |  |  | 22 |  |  | — |  |  | — |  |  | — |
European companies (excluding the U.K.) | 3 |  |  | — |  |  | — |  |  | — |  |  | 54 |  |  | — |  |  | — |  |  | — |
Asian-Pacific companies | 3 |  |  | — |  |  | — |  |  | — |  |  | 35 |  |  | — |  |  | — |  |  | — |
North American companies | 3 |  |  | — |  |  | — |  |  | — |  |  | 74 |  |  | — |  |  | — |  |  | — |
Emerging markets companies | 1 |  |  | — |  |  | — |  |  | — |  |  | 32 |  |  | — |  |  | — |  |  | — |
Global Equities | 2,253 |  |  | — |  |  | — |  |  | — |  |  | 1,684 |  |  | — |  |  | — |  |  | — |
Other | 1,950 |  |  | — |  |  | — |  |  | — |  |  | 2,584 |  |  | — |  |  | — |  |  | — |
Debt Securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.K. corporate bonds | — |  |  | — |  |  | — |  |  | — |  |  | 5 |  |  | — |  |  | 5 |  |  | — |
U.K. corporate bonds measured at NAV (a) | 574 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | $ | — |  |  | — |
U.K. gilts | 4,209 |  |  | — |  |  | 4,209 |  |  | — |  |  | 3,819 |  |  | — |  |  | 3,819 |  |  | — |
Alternative investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate measured at NAV (a) | 557 |  |  | — |  |  | — |  |  | — |  |  | 519 |  |  | — |  |  | — |  |  | — |
Fair value - U.K. pension plans | 9,966 |  |  | $ | 412 |  |  | $ | 4,209 |  |  | $ | — |  |  | 8,982 |  |  | $ | 154 |  |  | $ | 3,824 |  |  | $ | — |
Receivables and payables, net (b) | 4 |  |  |  |  |  |  |  |  | (37) |  |  |  |  |  |  |
Total U.K. pension assets | $ | 9,970 |  |  |  |  |  |  |  |  | $ | 8,945 |  |  |  |  |  |  |
(a)In accordance with accounting guidance certain investments that are measured at fair value using the net asset value per share (NAV), or its equivalent, practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in the table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the statement of financial position. (b)Receivables and payables, net represents amounts for investments sold/purchased but not yet settled along with interest and dividends earned but not yet received. Except for investments in real estate, the fair value measurements of WPD's pension plan assets are based on the same inputs and measurement techniques used to measure the U.S. pension plan assets described above. Investments in equity securities represent actively and passively managed funds that are measured against various equity indices. Other comprises a range of investment strategies, which invest in a variety of assets including equities, bonds, currencies, real estate and forestry held in unitized funds, which are considered in the Global Tactical Asset Allocation target. U.K. corporate bonds include investment grade corporate bonds of companies from diversified U.K. industries. U.K. gilts include gilts, index-linked gilts and swaps intended to track a portion of the plans' liabilities. Investments in real estate represent holdings in a U.K. unitized fund that owns and manages U.K. industrial and commercial real estate with a strategy of earning current rental income and achieving capital growth. The fair value measurement of the fund is based upon a net asset value per share, which is based on the value of underlying properties that are independently appraised in accordance with Royal Institution of Chartered Surveyors valuation standards at least annually with quarterly valuation updates based on recent sales of similar properties, leasing levels, property operations and/or market conditions. The fund may be subject to redemption restrictions in the unlikely event of a large forced sale in order to ensure other unit holders are not disadvantaged. Expected Cash Flows - U.S. Defined Benefit Plans (PPL) While PPL's U.S. defined benefit pension plans have the option to utilize available prior year credit balances to meet current and future contribution requirements, PPL contributed $30 million in January 2021 to its U.S. pension plans. No additional contributions are expected in 2021. PPL sponsors various non-qualified supplemental pension plans for which no assets are segregated from corporate assets. PPL expects to make approximately $18 million of benefit payments under these plans in 2021. PPL is not required to make contributions to its other postretirement benefit plans but has historically funded these plans in amounts equal to the postretirement benefit costs recognized. Continuation of this past practice would cause PPL to contribute $35 million to its other postretirement benefit plans in 2021. The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid by the plans and the following federal subsidy payments are expected to be received by PPL.
|  |  | Other Postretirement
| Pension |  | Benefit Payment |  | Expected Federal Subsidy
2021 | $ | 296 |  |  | $ | 49 |  |  | $ | 1 |
2022 | 284 |  |  | 47 |  |  | — |
2023 | 279 |  |  | 46 |  |  | — |
2024 | 275 |  |  | 44 |  |  | — |
2025 | 273 |  |  | 43 |  |  | — |
2026-2030 | 1,273 |  |  | 194 |  |  | 1 |
(LKE) Effective January 1, 2020, the LKE and LG&E defined benefit pension plans were merged into a combined defined benefit pension plan. While LKE's defined benefit pension plan has the option to utilize available prior year credit balances to meet current and future contribution requirements, LKE accelerated its planned January 2021 contribution of $23 million to December 2020. No contributions are expected in 2021. LKE sponsors various non-qualified supplemental pension plans for which no assets are segregated from corporate assets. LKE expects to make $6 million of benefit payments under these plans in 2021. LKE is not required to make contributions to its other postretirement benefit plan but has historically funded this plan in amounts equal to the postretirement benefit costs recognized. Continuation of this past practice would cause LKE to contribute a projected $15 million to its other postretirement benefit plan in 2021. The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid by the plans and the following federal subsidy payments are expected to be received by LKE.
|  |  | Other Postretirement
| Pension |  | Benefit Payment |  | Expected Federal Subsidy
2021 | $ | 121 |  |  | $ | 15 |  |  | $ | 1 |
2022 | 119 |  |  | 16 |  |  | — |
2023 | 118 |  |  | 16 |  |  | — |
2024 | 117 |  |  | 16 |  |  | — |
2025 | 115 |  |  | 16 |  |  | — |
2026-2030 | 533 |  |  | 75 |  |  | 1 |
Expected Cash Flows - U.K. Pension Plans (PPL) The pension plans of WPD are subject to formal actuarial valuations every three years, which are used to determine funding requirements. Contribution requirements were evaluated in accordance with the valuation performed as of March 31, 2019. WPD expects to make contributions of approximately $183 million in 2021. WPD is currently permitted to recover in current revenues approximately 78% of its pension funding requirements for its primary pension plans. The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid by the plans.
| Pension
2021 | $ | 362 |
2022 | 367 |
2023 | 370 |
2024 | 375 |
2025 | 377 |
2026-2030 | 1,884 |
Savings Plans (All Registrants) Substantially all employees of PPL's subsidiaries are eligible to participate in deferred savings plans (401(k)s). Employer contributions to the plans were:
| 2020 |  | 2019 |  | 2018
PPL | $ | 42 |  |  | $ | 42 |  |  | $ | 40 |
PPL Electric | 6 |  |  | 6 |  |  | 6 |
LKE | 19 |  |  | 21 |  |  | 20 |
LG&E | 6 |  |  | 6 |  |  | 6 |
KU | 5 |  |  | 5 |  |  | 5 |

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