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Transformation Programs - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2025	Apr. 30, 2024	Oct. 31, 2024
Restructuring Cost and Reserve [Line Items]
Transformation (credit) costs	$ (13)	$ 33	$ 2	$ 53
Accrued restructuring	39		39		$ 61
Transformation Program
Restructuring Cost and Reserve [Line Items]
Transformation (credit) costs	(13)	$ 34	2	$ 55
Accrued restructuring	38		38		61
Transformation Program | Other Accrued Liabilities
Restructuring Cost and Reserve [Line Items]
Accrued restructuring	14		14		17
Transformation Program | Long-Term Other Liabilities
Restructuring Cost and Reserve [Line Items]
Non-current restructuring liability reported in other liabilities	$ 88		$ 88		$ 106

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
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Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
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-Name Accounting Standards Codification
-Section S99
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Carrying amount as of the balance sheet date of known and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid after one year or beyond the next operating cycle, if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 420
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-Section S99
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