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Taxes on Earnings (Details)
$ in Millions
 3 Months Ended 9 Months Ended
Jul. 31, 2025
USD ($)
country
Jul. 31, 2024
USD ($)
Jul. 31, 2025
USD ($)
country
Jul. 31, 2024
USD ($)
Income Tax Disclosure [Abstract]        
Effective tax rate (as a percent) (22.30%) 22.60% 5.50% 22.70%
Income tax reconciliation other discrete items tax charges (credits) $ (281)   $ (315)  
Uncertain tax positions 243   228  
Restructuring benefits 20   58  
Effective income tax rate reconciliation, filing of tax returns in various jurisdictions, amount 15   18  
Effective income tax rate reconciliation, changes in valuation allowances, amount 55   55  
Effective income tax rate reconciliation, audit settlements in various jurisdictions, amount 22   22  
Internal reorganization amount 80   80  
Unrecognized tax benefits 1,000   1,000  
Unrecognized tax benefits that would impact effective tax rate 707   707  
Unrecognized increase in tax benefits change     238  
Penalties and interest accrued 129 $ 130 $ 129 $ 130
Likelihood of no resolution period     12 months  
Reasonably possible decrease in existing unrecognized tax benefits within the next 12 months $ 131   $ 131  
Other countries with income tax jurisdiction | country 61   61