Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2022	Oct. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 227	$ 236	$ 476	$ 428
Other comprehensive income (loss), net of tax:
Currency translation adjustments	(6)	(12)	(11)	(22)
Cash flow hedge adjustments	6	10	10	24
Postretirement benefits adjustments	2	4	4	8
Net other comprehensive income (loss)	2	2	3	10
Comprehensive income	$ 229	$ 238	$ 479	$ 438