Pension and Other Postretirement Benefits (Tables)

9 Months Ended

Jan. 31, 2026

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 and other postretirement benefit plans. Similar information for our international defined benefit plans is not presented due to immateriality.

	Three Months Ended				Nine Months Ended
	January 31,				January 31,
(Dollars in millions)	2025		2026		2025		2026
Pension Benefits:
Service cost	$	4	$	3	$	13	$	10
Interest cost	9		8		27		23
Expected return on plan assets	(10)		(8)		(29)		(25)
Amortization of:
Prior service cost	—		—		1		1
Net actuarial loss	1		1		1		3
Curtailment loss	1		—		1		—
Settlement charge	—		1		—		22
Net cost	$	5	$	5	$	14	$	34
Other Postretirement Benefits:
Interest cost	$	—	$	—	$	1	$	1
Special termination benefits	1		—		1		—
Curtailment loss	1		—		1		—
Net cost	$	2	$	—	$	3	$	1