Financial Instruments - Schedule of Pre-Tax Effect of Derivative Instruments and Related Hedged Items in a Fair Value Hedging Relationship (Details) - Interest and other, net - Interest rate contracts - 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 earnings on derivative instruments	$ 20	$ 36	$ 20
Gain/(loss) recognized in earnings on hedged item	$ (20)	$ (36)	$ (20)