Offsetting Derivative Assets and Liabilities (Details) - USD ($) $ in Millions	Jul. 31, 2023	Apr. 30, 2023
Offsetting Assets and Liabilities [Line Items]
Gross Amount of Derivative Assets	$ 22	$ 28
Gross Amount of Derivative Liabilities Offset Against Derivative Assets in Balance Sheet	(14)	(12)
Net Amount of Derivative Assets Presented in Balance Sheet	8	16
Gross Amount of Derivative Liabilities Not Offset Against Derivative Assets in Balance Sheet	0	(1)
Net Amount of Derivative Assets	8	15
Gross Amount of Derivative Liabilities	(15)	(14)
Gross Amount of Derivative Assets Offset Against Derivative Liabilities in Balance Sheet	14	12
Net Amount of Derivative Liabilities Presented in Balance Sheet	1	2
Gross Amount of Derivative Assets Not Offset Against Derivative Liabilities in Balance Sheet	0	1
Net Amount of Derivative Liabilities	$ 1	$ 1