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	3 Months Ended		9 Months Ended
	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2024	Jul. 31, 2023
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) recognized in Accumulated other comprehensive (loss) income on derivatives	$ (36)	$ (68)	$ (47)	$ (757)
Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) recognized in Accumulated other comprehensive (loss) income on derivatives	(36)	(68)	(47)	(757)
Foreign currency contracts | Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) recognized in Accumulated other comprehensive (loss) income on derivatives	(33)	(68)	(44)	(757)
Interest rate contracts | Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) recognized in Accumulated other comprehensive (loss) income on derivatives	$ (3)	$ 0	$ (3)	$ 0