Offsetting Derivative Assets and Liabilities (Details) - USD ($) $ in Millions	Jul. 31, 2025	Apr. 30, 2025
Offsetting Assets and Liabilities [Line Items]
Gross Amount of Derivative Assets	$ 4	$ 4
Gross Amount of Derivative Liabilities Offset Against Derivative Assets in Balance Sheet	(3)	(2)
Net Amount of Derivative Assets Presented in Balance Sheet	1	2
Gross Amount of Derivative Liabilities Not Offset Against Derivative Assets in Balance Sheet	0	0
Net Amount of Derivative Assets	1	2
Gross Amount of Derivative Liabilities	(12)	(14)
Gross Amount of Derivative Assets Offset Against Derivative Liabilities in Balance Sheet	3	2
Net Amount of Derivative Liabilities Presented in Balance Sheet	(9)	(12)
Gross Amount of Derivative Assets Not Offset Against Derivative Liabilities in Balance Sheet	0	0
Net Amount of Derivative Liabilities	$ (9)	$ (12)