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PENSION PLANS AND OTHER POST RETIREMENT BENEFITS
 3 Months Ended
Sep. 30, 2022
Retirement Benefits [Abstract]  
PENSION PLANS AND OTHER POST RETIREMENT BENEFITS PENSION PLANS AND OTHER POST RETIREMENT BENEFITS
Defined Benefit Plans
CDT Plan
CDT sponsors an unfunded defined benefit pension plan covering substantially all CDT employees (CDT plan) which provides for old age, disability and survivors’ benefits. Benefits under the CDT plan are generally based on age at retirement, years of service and the employee’s annual earnings. The net periodic cost of this pension plan is determined using the projected unit credit method and several actuarial assumptions, the most significant of which are the discount rate and estimated service costs. No contributions have been made since the inception of the plan.
GXS GER Plan
As part of our acquisition of GXS Group, Inc. (GXS) in Fiscal 2014, we assumed an unfunded defined benefit pension plan covering certain German employees which provides for old age, disability and survivors' benefits. The GXS GER plan has been closed to new participants since 2006. Benefits under the GXS GER plan are generally based on a participant’s remuneration, date of hire, years of eligible service and age at retirement. The net periodic cost of this pension plan is determined using the projected unit credit method and several actuarial assumptions, the most significant of which are the discount rate and estimated service costs. No contributions have been made since the inception of the plan.
GXS PHP Plan
As part of our acquisition of GXS in Fiscal 2014, we assumed a primarily unfunded defined benefit pension plan covering substantially all of the GXS Philippines employees which provides for retirement, disability and survivors' benefits. Benefits under the GXS PHP plan are generally based on a participant’s remuneration, years of eligible service and age at retirement. The net periodic cost of this pension plan is determined using the projected unit credit method and several actuarial assumptions, the most significant of which are the discount rate and estimated service costs. Aside from an initial contribution which has a fair value of $(0.03) million as of September 30, 2022, no additional contributions have been made since the inception of the plan.
The following are details of net pension expense relating to the following pension plans:
 Three Months Ended September 30,
 20222021
Pension expense:CDTGXS GERGXS PHPTotalCDTGXS GERGXS PHPTotal
Service cost$52 $25 $351 $428 $94 $43 $428 $565 
Interest cost195 119 149 463 112 80 133 325 
Amortization of actuarial (gains) losses — (15)46 31 125 6 (23)108 
Net pension expense$247 $129 $546 $922 $331 $129 $538 $998 
Service-related net periodic pension costs are recorded within operating expense and all other non-service related net periodic pension costs are classified under “Interest and other related expense, net” on our Condensed Consolidated Statements of Income.
Other Plans
Other plans include defined benefit pension plans that are offered or statutorily required by certain of our foreign subsidiaries. Many of these plans were assumed through our acquisitions or are required by local regulatory requirements. These other plans are primarily unfunded, with the aggregate projected benefit obligation included in our pension liability. The net periodic costs of these plans are determined using the projected unit credit method and several actuarial assumptions, the most significant of which are the discount rate and estimated service costs.