Supplementary Financial Information - Schedule of Other Non-Current Liabilities (Details) - USD ($) $ in Millions	Oct. 31, 2025	Oct. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred revenue	$ 1,632	$ 1,487
Tax liability	496	839
Operating lease liabilities	$ 815	$ 787
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other non-current liabilities	Other non-current liabilities
Pension, post-retirement, and post-employment liabilities	$ 564	$ 607
Deferred tax liability	16	31
Other	513	531
Other non-current liabilities	$ 4,036	$ 4,282