Financial Instruments - Schedule of Pre-Tax Effect of Derivative Instruments and Related Hedged Items in a Fair Value Hedging Relationship (Details) - Interest rate contracts - Interest and other, net - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Apr. 30, 2026	Apr. 30, 2025	Apr. 30, 2026	Apr. 30, 2025
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) recognized in earnings on derivative instruments	$ 0	$ 8	$ 1	$ 15
Gain/(loss) recognized in earnings on hedged item	$ 0	$ (8)	$ (1)	$ (15)

Financial Instruments - Schedule of Pre-Tax Effect of Derivative Instruments and Related Hedged Items in a Fair Value Hedging Relationship (Details) - Interest rate contracts - Interest and other, net - USD ($)
$ in Millions

3 Months Ended

6 Months Ended

Apr. 30, 2026

Apr. 30, 2025

Apr. 30, 2026

Apr. 30, 2025

Derivative Instruments, Gain (Loss) [Line Items]

Gain/(loss) recognized in earnings on derivative instruments

$ 0

$ 8

$ 1

$ 15

Gain/(loss) recognized in earnings on hedged item

$ 0

$ (8)

$ (1)

$ (15)

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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+ Details