Supplementary Financial Information - Schedule of Other Non-Current Assets (Details) - USD ($) $ in Millions	Jul. 31, 2024	Oct. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred tax assets	$ 3,131	$ 3,155
Intangible assets	$ 1,365	$ 1,593
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other non-current assets	Other non-current assets
Right-of-use assets	$ 1,124	$ 1,188
Deposits and prepaid	338	427
Prepaid pension and post-retirement benefit assets	355	393
Other	994	853
Other non-current assets	$ 7,307	$ 7,609