Supplementary Financial Information - Other Non-Current Liabilities (Details) - USD ($) $ in Millions	Jan. 31, 2022	Oct. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred revenue	$ 1,119	$ 1,099
Pension, post-retirement, and post-employment liabilities	$ 993	$ 1,041
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other non-current liabilities	Other non-current liabilities
Operating lease liabilities	$ 911	$ 936
Tax liability	790	830
Deferred tax liability	64	57
Other	796	815
Other non-current liabilities	$ 4,673	$ 4,778