Supplementary Financial Information - Other Non-Current Assets (Details) - USD ($) $ in Millions	Oct. 31, 2023	Oct. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred tax assets	$ 3,155	$ 2,167
Intangible assets	$ 1,593	$ 1,933
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	$ 1,188	$ 1,236
Deposits and prepaid	427	474
Prepaid pension asset and post-retirement benefit assets	393	642
Other	853	991
Other non-current assets, total	$ 7,609	$ 7,443