Supplementary Financial Information - Schedule of Other Non-Current Liabilities (Details) - USD ($) $ in Millions	Jul. 31, 2024	Oct. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred revenue	$ 1,473	$ 1,324
Tax liability	$ 869	$ 904
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other non-current liabilities	Other non-current liabilities
Operating lease liabilities	$ 749	$ 825
Pension, post-retirement, and post-employment liabilities	523	546
Deferred tax liability	28	44
Other	537	688
Other non-current liabilities	$ 4,179	$ 4,331