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		6 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2024	Apr. 30, 2023
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) recognized in Accumulated other comprehensive loss on derivative	$ 151	$ (66)	$ (11)	$ (689)
Foreign currency contracts | Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) recognized in Accumulated other comprehensive loss on derivative	$ 151	$ (66)	$ (11)	$ (689)