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Financial Instruments - Pre-tax Effect of Derivative Instruments in Hedging Relationships on OCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2025	Apr. 30, 2024
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedge, gain (loss), before reclassification and tax, foreign exchange contracts	$ (465)	$ 169	$ (195)	$ (35)
Total	(529)	189	(216)	(54)
Expected amount of AOCI expected to be reclassified in the next 12 months	113		113
Foreign currency contracts
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedge, gain (loss), before reclassification and tax, foreign exchange contracts	(465)	169	(195)	(35)
Investment hedge, gain (loss), before reclassification and tax, foreign exchange contracts	$ (64)	$ 20	$ (21)	$ (19)

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Other Comprehensive Income (Loss), Derivative Cash Flow And Net Investment Hedges, Increase (Decrease), Before Adjustments And Tax

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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.

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The estimated net amount of unrealized gains or losses on foreign currency cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

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Amount, before tax and reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness.

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Amount, before tax and reclassification, of gain (loss) from derivative designated and qualifying as net investment hedge.

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