Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 783	$ 838	$ 903
Other comprehensive income (loss), net of tax:
Currency translation adjustments	135	(60)	123
Cash flow hedge adjustments	(27)	53	(76)
Postretirement benefits adjustments	9	77	78
Net other comprehensive income (loss)	117	70	125
Comprehensive income	$ 900	$ 908	$ 1,028