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Retirement Plans
 9 Months Ended
Jan. 31, 2024
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
January 31,		Nine Months Ended
January 31,
2024202320242023
Service cost$134 $218 $400 $610 
Interest cost6,963 6,264 20,782 18,447 
Expected return on plan assets(7,458)(8,281)(22,347)(24,703)
Amortization of prior service cost(24)(23)(71)(70)
Amortization of net actuarial loss2,046 1,602 6,072 4,593 
Net pension expense (income)$1,661 $(220)$4,836 $(1,123)
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 $3.9 million and $11.6 million for the three and nine months ended January 31, 2024, respectively, and $3.6 million and $11.0 million for the three and nine months ended January 31, 2023, respectively.
Defined Contribution Savings Plans
The expense for employer defined contribution savings plans was $7.1 million and $21.5 million for the three and nine months ended January 31, 2024, respectively, and $7.9 million and $23.5 million for the three and nine months ended January 31, 2023, respectively.