Supplementary Financial Information - Other Non-Current Assets (Details) - USD ($) $ in Millions	Oct. 31, 2024	Oct. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred tax assets	$ 3,311	$ 3,155
Intangible assets	$ 1,319	$ 1,593
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other non-current assets, total	Other non-current assets, total
Right-of-use assets	$ 1,165	$ 1,188
Prepaid pension and post-retirement benefit assets	362	393
Deposits and prepaid	322	427
Other	1,129	853
Other non-current assets, total	$ 7,608	$ 7,609