Supplementary Financial Information - Other Non-Current Assets (Details) - USD ($) $ in Millions	Apr. 30, 2022	Oct. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred tax assets	$ 2,810	$ 2,917
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other non-current assets	Other non-current assets
Right-of-use assets from operating leases, net	$ 1,098	$ 1,192
Prepaid pension asset	837	766
Intangible assets	651	784
Deposits and prepaid	659	734
Other	917	698
Other non-current assets	$ 6,972	$ 7,091