Derivative Financial Instruments and Hedging Activities (Gain (Loss) on Derivatives Recognized in Consolidated Statement of Operations) (Details) - USD ($) $ in Millions	12 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
Total amounts presented in the accompanying condensed consolidated statements of operations for line items affected by the net gains (losses) shown above: [Abstract]
Sales	$ 5,372	$ 5,081	$ 4,526
Other income (expense), net	(119)	(59)	15
Foreign Currency Denominated Debt [Member]
Foreign currency-denominated debt designated as net investment hedge: [Abstract]
Net gain (loss) recognized in AOCI	3	78	(73)
Currency derivatives [Member]
Currency derivatives designated as cash flow hedges: [Abstract]
Net gain (loss) recognized in AOCI	4	76	(78)
Currency derivatives [Member] | Sales [Member]
Currency derivatives designated as cash flow hedges: [Abstract]
Net gain (loss) reclassified from AOCI into earnings	37	5	21
Currency derivatives not designated as hedging instruments: [Abstract]
Net gain (loss) recognized in earnings	(1)	12	(13)
Currency derivatives [Member] | Other Income (Expense), Net [Member]
Currency derivatives designated as cash flow hedges: [Abstract]
Net gain (loss) reclassified from AOCI into earnings	0	2	0
Currency derivatives not designated as hedging instruments: [Abstract]
Net gain (loss) recognized in earnings	16	5	17
Interest Rate Contract
Currency derivatives designated as cash flow hedges: [Abstract]
Net gain (loss) recognized in AOCI	$ (1)	$ 0	$ 0