Leases ROU Assets and Liabilities (Details) - USD ($) $ in Millions	Apr. 30, 2024	Apr. 30, 2023
Leases [Abstract]
Right-of-use assets	$ 96	$ 84
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]
Lease Liabilities:
Current	$ 24	$ 22
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]
Non-current	$ 73	$ 63
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]
Total	$ 97	$ 85
Weighted-average discount rate	4.20%	3.30%
Weighted-average remaining term	5 years 1 month 6 days	5 years 1 month 6 days