Goodwill and Other Intangible Assets (Details) $ in Millions	9 Months Ended
	Jan. 31, 2022 USD ($)
Goodwill [Roll Forward]
Balance at April 30, 2021	$ 779
Foreign currency translation adjustment	(8)
Balance at January 31, 2022	771
Indefinite-lived Intangible Assets [Roll Forward]
Balance at April 30, 2021	676
Foreign currency translation adjustment	(24)
Balance at January 31, 2022	$ 652