Supplementary Financial Information - Schedule of Other Non-Current Liabilities (Details) - USD ($) $ in Millions	Jul. 31, 2025	Oct. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred revenue	$ 1,588	$ 1,487
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other non-current liabilities	Other non-current liabilities
Operating lease liabilities	$ 764	$ 787
Tax liability	620	839
Pension, post-retirement, and post-employment liabilities	598	607
Deferred tax liability	15	31
Other	524	531
Other non-current liabilities	$ 4,109	$ 4,282