Financial Instruments - Schedule of Pre-Tax Effect of Derivative Instruments in Cash Flow Hedging Relationships Included in Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2023
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) recognized in Accumulated other comprehensive (loss) income on derivatives	$ (211)	$ 51	$ (427)
Foreign currency contracts | Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) recognized in Accumulated other comprehensive (loss) income on derivatives	(214)	47	(427)
Interest rate contracts | Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) recognized in Accumulated other comprehensive (loss) income on derivatives	$ 3	$ 4	$ 0