Derivative Financial Instruments and Hedging Activities (Details 1) - USD ($) $ in Millions	Jul. 31, 2023	Apr. 30, 2023
Fair values of derivative instruments
Derivative Asset, Fair Value, Gross Asset	$ 22	$ 28
Derivative Liability, Fair Value, Gross Liability	15	14
Currency derivatives [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Other Current Assets [Member]
Fair values of derivative instruments
Derivative Asset, Fair Value, Gross Asset	15	20
Derivative Liability, Fair Value, Gross Liability	(11)	(11)
Currency derivatives [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Other Assets [Member]
Fair values of derivative instruments
Derivative Asset, Fair Value, Gross Asset	2	5
Derivative Liability, Fair Value, Gross Liability	(1)	(1)
Currency derivatives [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Accrued Expenses [Member]
Fair values of derivative instruments
Derivative Asset, Fair Value, Gross Asset	2	0
Derivative Liability, Fair Value, Gross Liability	(2)	(1)
Currency derivatives [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Other Liabilities [Member]
Fair values of derivative instruments
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Liability, Fair Value, Gross Liability	(1)	(1)
Currency derivatives [Member] | Not designated as hedges [Member] | Other Current Assets [Member]
Fair values of derivative instruments
Derivative Asset, Fair Value, Gross Asset	3	3
Derivative Liability, Fair Value, Gross Liability	$ 0	$ 0