Supplementary Financial Information - Schedule of Other Non-Current Assets (Details) - USD ($) $ in Millions	Jan. 31, 2024	Oct. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred tax assets	$ 3,230	$ 3,155
Intangible assets	1,519	1,593
Right-of-use assets	$ 1,165	$ 1,188
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other non-current assets	Other non-current assets
Deposits and prepaid	$ 412	$ 427
Prepaid pension and post-retirement benefit assets	395	393
Other	850	853
Other non-current assets	$ 7,571	$ 7,609