Offsetting Derivative Assets and Liabilities (Details) - USD ($) $ in Millions	Jul. 31, 2024	Apr. 30, 2024
Offsetting Assets and Liabilities [Line Items]
Gross Amount of Derivative Assets	$ 11	$ 12
Gross Amount of Derivative Liabilities Offset Against Derivative Assets in Balance Sheet	(3)	(3)
Net Amount of Derivative Assets Presented in Balance Sheet	8	9
Gross Amount of Derivative Liabilities Not Offset Against Derivative Assets in Balance Sheet	0	0
Net Amount of Derivative Assets	8	9
Gross Amount of Derivative Liabilities	(5)	(4)
Gross Amount of Derivative Assets Offset Against Derivative Liabilities in Balance Sheet	3	3
Net Amount of Derivative Liabilities Presented in Balance Sheet	2	1
Gross Amount of Derivative Assets Not Offset Against Derivative Liabilities in Balance Sheet	0	0
Net Amount of Derivative Liabilities	$ 2	$ 1