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Retirement Plans
 6 Months Ended
Oct. 31, 2022
Retirement Benefits [Abstract]  
Retirement Plans Retirement Plans
The components of net pension income for our defined benefit plans were as follows:
Three Months Ended
October 31, 		Six Months Ended
October 31,
2022202120222021
Service cost$192 $300 $392 $607 
Interest cost5,994 5,178 12,183 10,401 
Expected return on plan assets(8,038)(10,142)(16,422)(20,401)
Amortization of prior service cost(24)(22)(47)(44)
Amortization of net actuarial loss1,467 1,877 2,991 3,774 
Net pension income$(409)$(2,809)$(903)$(5,663)
The service cost component of net pension income is reflected in Operating and administrative expenses on our Unaudited Condensed Consolidated Statements of Net Income. The other components of net pension income are reported separately from the service cost component and below Operating income. Such amounts are reflected in Other (expense) income, net on our Unaudited Condensed Consolidated Statements of Net Income.
Employer defined benefit pension plan contributions were $3.5 million and $7.4 million for the three and six months ended October 31, 2022, respectively, and $4.0 million and $8.5 million for the three and six months ended October 31, 2021, respectively.
Defined Contribution Savings Plans
The expense for employer defined contribution savings plans was $6.8 million and $15.6 million for the three and six months ended October 31, 2022, respectively, and $6.5 million and $15.6 million for the three and six months ended October 31, 2021, respectively.