Derivative Financial Instruments and Hedging Activities (Fair Value of Derivatives in a Gain (Loss) Position) (Details) - USD ($) $ in Millions	Apr. 30, 2026	Apr. 30, 2025
Fair values of derivative instruments
Derivative Asset, Fair Value, Gross Asset	$ 4	$ 4
Derivative Liability, Fair Value, Gross Liability	(17)	(14)
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	2
Derivative Liability, Fair Value, Gross Liability	(15)	(11)
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	1	0
Derivative Liability, Fair Value, Gross Liability	(2)	(3)
Currency derivatives [Member] \| Not designated as hedges [Member] \| Other Current Assets [Member]
Fair values of derivative instruments
Derivative Asset, Fair Value, Gross Asset	1	2
Derivative Liability, Fair Value, Gross Liability	$ 0	$ 0

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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