Supplementary Financial Information - Other Non-Current Liabilities (Details) - USD ($) $ in Millions	Jul. 31, 2023	Oct. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred revenue	$ 1,271	$ 1,171
Tax liability	957	911
Operating lease liability	$ 829	$ 875
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	$ 595	$ 600
Deferred tax liability	25	121
Other	774	856
Other non-current liabilities	$ 4,451	$ 4,534