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Pension and Other Postretirement Benefits
 3 Months Ended
Jul. 31, 2023
Retirement Benefits [Abstract]  
Pension and Other Postretirement Benefits Pension Costs
The following table shows the components of the net cost recognized for our U.S. pension plans. Similar information for other defined benefit plans is not presented due to immateriality.
Three Months Ended
July 31,
(Dollars in millions)20222023
Service cost$5 $5 
Interest cost8 8 
Expected return on plan assets(11)(10)
Amortization of net actuarial loss3 2 
Net cost$5 $5