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Retirement Plans | 3 Months Ended
--- | ---
Jul. 31, 2023
Retirement Benefits [Abstract] |
Retirement Plans | Retirement Plans The components of net pension expense (income) for our defined benefit plans were as follows:
| Three Months Ended July 31,
| 2023 |  | 2022
Service cost | $ | 134 |  |  | $ | 200 |
Interest cost | 6,947 |  |  | 6,189 |
Expected return on plan assets | (7,491) |  |  | (8,384) |
Amortization of prior service cost | (23) |  |  | (23) |
Amortization of net actuarial loss | 2,026 |  |  | 1,524 |
Net pension expense (income) | $ | 1,593 |  |  | $ | (494) |
The service cost component of net pension expense (income) is reflected in Operating and administrative expenses on our Unaudited Condensed Consolidated Statements of Net Loss. The other components of net pension expense (income) are reported separately from the service cost component and below Operating loss. Such amounts are reflected in Other (expense) income, net on our Unaudited Condensed Consolidated Statements of Net Loss. Employer defined benefit pension plan contributions were $4.1 million and $3.9 million for the three months ended July 31, 2023 and 2022, respectively. Defined Contribution Savings Plans The expense for employer defined contribution savings plans was $7.7 million and $8.8 million for the three months ended July 31, 2023 and 2022, respectively.

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