Divestiture (Details) - USD ($) $ in Millions	12 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021	Jul. 31, 2022
Acquisitions and Divestiture [Abstract]
Proceeds from Divestiture of Businesses	$ 0	$ 0	$ 177
Disposal Group, Including Discontinued Operation, Assets				$ 50
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	$ 0	$ 0	$ 127