Pension and Other Postretirement Benefits Sponsor Location (Details)	12 Months Ended
	Apr. 30, 2023	Apr. 30, 2022
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Sponsor Location [Extensible List]	Domestic Plan [Member]	Domestic Plan [Member]
Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Sponsor Location [Extensible List]	Domestic Plan [Member]	Domestic Plan [Member]