Supplementary Financial Information - Other Non-Current Assets (Details) - USD ($) $ in Millions	Jul. 31, 2023	Oct. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred tax assets	$ 3,054	$ 2,167
Intangible assets	1,690	1,933
Right-of-use assets	$ 1,171	$ 1,236
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other non-current assets	Other non-current assets
Prepaid pension and post-retirement benefit assets	$ 559	$ 642
Deposits and prepaids	470	474
Other	828	991
Other non-current assets	$ 7,772	$ 7,443