Taxes on Earnings - Deferred Tax Asset Valuation Allowance (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2021
Valuation Allowance [Line Items]
Valuation allowance for deferred tax assets	$ 6,688	$ 6,994	$ 7,592	$ 7,749
Deferred tax asset valuation allowance
Valuation Allowance [Line Items]
Valuation allowance for deferred tax assets	6,700	7,000	7,600
Decrease in valuation allowances	$ 306	$ 598	$ 157