Pension and Other Postretirement Benefits (Tables)

9 Months Ended

Jan. 31, 2023

Retirement Benefits [Abstract]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

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				Nine Months Ended
	January 31,				January 31,
(Dollars in millions)	2022		2023		2022		2023
Service cost	$	7	$	5	$	20	$	16
Interest cost	5		8		16		24
Expected return on plan assets	(11)		(11)		(34)		(33)
Amortization of:
Prior service cost	—		—		1		1
Net actuarial loss	6		2		18		7
Settlement charge	—		27		1		27
Net cost	$	7	$	31	$	22	$	42