Income Taxes (Schedule of Income from U.S. and Foreign Operations) (Details) - USD ($) $ in Millions	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020
Domestic and Foreign components of our Income before Income taxes
United States	$ 954	$ 832	$ 849
Foreign	160	249	160
Income before income taxes	$ 1,114	$ 1,081	$ 1,009