Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Jul. 31, 2022	Jul. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 249	$ 192
Other comprehensive income (loss), net of tax:
Currency translation adjustments	(5)	(10)
Cash flow hedge adjustments	4	14
Postretirement benefits adjustments	2	4
Net other comprehensive income (loss)	1	8
Comprehensive income	$ 250	$ 200