Pension and Other Postretirement Benefits (Tables)

6 Months Ended

Oct. 31, 2022

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				Six Months Ended
	October 31,				October 31,
(Dollars in millions)	2021		2022		2021		2022
Service cost	$	6	$	5	$	13	$	10
Interest cost	6		8		11		16
Expected return on plan assets	(11)		(11)		(23)		(22)
Amortization of:
Prior service cost	—		—		1		—
Net actuarial loss	6		3		12		5
Settlement charge	1		—		1		—
Net cost	$	8	$	5	$	15	$	9