Supplemental Information (Net Sales by Geography) (Details) - USD ($) $ in Millions	12 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2022
Geographic Areas, Revenues from External Customers [Abstract]
Net sales	$ 4,178	$ 4,228	$ 3,933
United States
Geographic Areas, Revenues from External Customers [Abstract]
Net sales	1,889	1,968	1,917
Mexico
Geographic Areas, Revenues from External Customers [Abstract]
Net sales	290	244	178
Germany
Geographic Areas, Revenues from External Customers [Abstract]
Net sales	263	239	228
Australia
Geographic Areas, Revenues from External Customers [Abstract]
Net sales	204	221	219
United Kingdom
Geographic Areas, Revenues from External Customers [Abstract]
Net sales	185	207	218
Other Countries
Geographic Areas, Revenues from External Customers [Abstract]
Net sales	$ 1,348	$ 1,349	$ 1,173